diff --git a/Makefile b/Makefile
index 7ad8fcb..750f70e 100644
--- a/Makefile
+++ b/Makefile
@@ -31,4 +31,4 @@ bidder_deposit_validator:
 	cabal v2-run hydra-auction-onchain-exe -- --script bidder_deposit
 
 auction_metadata_validator:
-	cabal v2-run hydra-auction-onchain-exe -- --script metadata
+	cabal v2-run hydra-auction-onchain-exe -- --script auction_metadata
diff --git a/app/Main.hs b/app/Main.hs
index cb4f2c9..d3b1f90 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -5,6 +5,8 @@ import HydraAuctionOnchain.Scripts
   , auctionMetadataValidatorUntyped
   , auctionMintingPolicyUntyped
   , bidderDepositValidatorUntyped
+  , delegateGroupMetadataValidatorUntyped
+  , delegateGroupMintingPolicyUntyped
   , standingBidValidatorUntyped
   , writeScript
   )
@@ -30,6 +32,8 @@ main =
       writeStandingBidValidator
       writeBidderDepositValidator
       writeAuctionMetadataValidator
+      writeDelegateGroupMintingPolicy
+      writeDelegateGroupMetadataValidator
     AuctionMintingPolicy ->
       writeAuctionMintingPolicy
     AuctionEscrowValidator ->
@@ -40,6 +44,10 @@ main =
       writeBidderDepositValidator
     AuctionMetadataValidator ->
       writeAuctionMetadataValidator
+    DelegateGroupMintingPolicy ->
+      writeDelegateGroupMintingPolicy
+    DelegateGroupMetadataValidator ->
+      writeDelegateGroupMetadataValidator
 
 writeAuctionMintingPolicy :: IO ()
 writeAuctionMintingPolicy =
@@ -76,6 +84,20 @@ writeAuctionMetadataValidator =
     "compiled/auction_metadata_validator.plutus"
     auctionMetadataValidatorUntyped
 
+writeDelegateGroupMintingPolicy :: IO ()
+writeDelegateGroupMintingPolicy =
+  writeScript
+    "Delegate group minting policy"
+    "compiled/delegate_group_minting_policy.plutus"
+    delegateGroupMintingPolicyUntyped
+
+writeDelegateGroupMetadataValidator :: IO ()
+writeDelegateGroupMetadataValidator =
+  writeScript
+    "Delegate group metadata validator"
+    "compiled/delegate_group_metadata_validator.plutus"
+    delegateGroupMetadataValidatorUntyped
+
 data ScriptToCompile
   = AllScripts
   | AuctionMintingPolicy
@@ -83,6 +105,8 @@ data ScriptToCompile
   | StandingBidValidator
   | BidderDepositValidator
   | AuctionMetadataValidator
+  | DelegateGroupMintingPolicy
+  | DelegateGroupMetadataValidator
   deriving stock (Show, Eq)
 
 toScript :: String -> Maybe ScriptToCompile
@@ -92,7 +116,9 @@ toScript = \case
   "auction_escrow" -> Just AuctionEscrowValidator
   "standing_bid" -> Just StandingBidValidator
   "bidder_deposit" -> Just BidderDepositValidator
-  "metadata" -> Just AuctionMetadataValidator
+  "auction_metadata" -> Just AuctionMetadataValidator
+  "delegate_group_mp" -> Just DelegateGroupMintingPolicy
+  "delegate_group_metadata" -> Just DelegateGroupMetadataValidator
   _ -> Nothing
 
 scriptToCompile :: Parser ScriptToCompile
diff --git a/compiled/delegate_group_metadata_validator.plutus b/compiled/delegate_group_metadata_validator.plutus
new file mode 100644
index 0000000..147e45a
--- /dev/null
+++ b/compiled/delegate_group_metadata_validator.plutus
@@ -0,0 +1,8 @@
+{
+    "cborHex": "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",
+    "description": "Delegate group metadata validator",
+    "params": [],
+    "rawHex": "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",
+    "role": "ValidatorRole",
+    "version": "ScriptV2"
+}
\ No newline at end of file
diff --git a/compiled/delegate_group_minting_policy.plutus b/compiled/delegate_group_minting_policy.plutus
new file mode 100644
index 0000000..d58f17e
--- /dev/null
+++ b/compiled/delegate_group_minting_policy.plutus
@@ -0,0 +1,11 @@
+{
+    "cborHex": "59063b590638010000323232323232323232323232323232323232323232323232323232323232323232322222333322223232323253330273370e90010010992999814198071980800280098149980980b9919b81480000052002149854cc09d2410544474d50380016301b323756605864605c604a002605c0026056605a00a264646464a666056660226602601000260586602c03490010a9998159919800925114a064664604a44a666050002244a0022666006606600244460040062600460680024a66605a66ebc034c0c4c0cc004488c00800c4894004004dd61817801899299981619b87333222333301c002480008cccc074009200075a6eac00400cdd598181818981900080480da400426464a66605c66e3cdd718190008058a99981719918139129998150008a5115332233303300200114a06006606a00226004606c002466446605244a666058002294054ccc0cccdd7981b8008018a51130023038001002375860666056606800c0026eb0c0c8c0cc004526153302d49010544474d50370016153302d4910544474d5036001630330013302a49010544474d5035003232323253330303370e9002001098189919191919002a99981a19b87480000084c8c8c94ccc0dd4cc8cc0e000452899b87001480004cdc3800a40702646464646464646464646464646493299981e8008a4c2a660860682c60900066eb8004c114004c1140194ccc0fccdc3a400000426464646464646493299981f0008a4c2a6608806a2c6092006660684640046eb8004dd600098230009823001998189190011bae001375800260860022a6607c0622c608a00460800026ea8004c0fc004c0fc00ccc0a88c94ccc0eccdc39b8d001480e0400854cc0e92412c7074727946726f6d28505075624b657948617368293a206d757374206265203238206279746573206c6f6e670016375c0026eb0004c0f0004c0f001054cc0d9241387074727946726f6d2843757272656e637953796d626f6c293a206d757374206265203238206279746573206c6f6e67206f7220656d7074790016371a0026eb8004c0e000454cc0cc09858c0e8008c0d4004dd5000981a0008819181b00118188009baa001303030293032001153302b4910544474d50340016330294910544474d50330033223302522533302800110311533302f3025303400113030303300110313302522533302800110221325333030300500113302b001300330350021300330350023033001001233223232323253330323370e90000010a5013371e6eb8c0d8004014c0e0008c0cc004dd50009819181a001181818190008069bac302f30283031004153302a4910544474d50320016153302a4910544474d50310016301e3756605c002604a605c002605c0026056605a00a605a00460500026ea800ccc08524010544474d50300032323253330263370e9000001098139bae302a0011028302c00230270013754604e605060520026eb801000c00800488cc0088cc0088cc014008004528099800925014a24466ebcdd30011ba600123300200337520024446602444a66602a002244a0022a66603866ebcc07cc0800040104c014c0800044c008c0840040048c888c00800cdd5980f00091198019ba90023750002446602266ec00080040408c008dd480091111980711299980880088028a99980c19baf301b301c00100613004301f301c00113002301d0010014890e44454c45474154455f47524f5550004901317074727946726f6d2850446174615265636f72645b5d293a206c697374206973206c6f6e676572207468616e207a65726f002300822533300b001100513300d30033016001300230170014913f7265616368656420656e64206f662073756d207768696c65207374696c6c206e6f7420686176696e6720666f756e642074686520636f6e7374727563746f72004bd701198011192999807980280089128008911801001998029299980799baf00137509000091280089118010018008009180191998011bab001232223002003374c002244a002ae8c88cc00c894ccc018004401c4c8ccc014c054c0480088cc028cdd818091809801800801080098011809000800919180111980100100091801119801001000aab9f4bd6f7b6302ba02300a3002001230093009001223300120011533003002165738ae68888c00800c89400555ceaba15744460046ea800555cf01",
+    "description": "Delegate group minting policy",
+    "params": [
+        "Ply.Core.Types:AsData#PlutusLedgerApi.V1.Scripts:ScriptHash",
+        "Ply.Core.Types:AsData#PlutusLedgerApi.V1.Tx:TxOutRef"
+    ],
+    "rawHex": "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",
+    "role": "MintingPolicyRole",
+    "version": "ScriptV2"
+}
\ No newline at end of file
diff --git a/compiled/standing_bid_validator.plutus b/compiled/standing_bid_validator.plutus
index 661d810..dc67886 100644
--- a/compiled/standing_bid_validator.plutus
+++ b/compiled/standing_bid_validator.plutus
@@ -1,11 +1,11 @@
 {
-    "cborHex": 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     "description": "Standing bid validator",
     "params": [
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         "Ply.Core.Types:AsData#HydraAuctionOnchain.Types.AuctionTerms:AuctionTerms"
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     "role": "ValidatorRole",
     "version": "ScriptV2"
 }
\ No newline at end of file
diff --git a/hydra-auction-onchain.cabal b/hydra-auction-onchain.cabal
index e7edb1a..f97777c 100644
--- a/hydra-auction-onchain.cabal
+++ b/hydra-auction-onchain.cabal
@@ -103,9 +103,11 @@ library
   import:          common-lang
   exposed-modules:
     HydraAuctionOnchain.Errors.MintingPolicies.Auction
+    HydraAuctionOnchain.Errors.MintingPolicies.DelegateGroup
     HydraAuctionOnchain.Errors.Types.AuctionTerms
     HydraAuctionOnchain.Errors.Validators.AuctionEscrow
     HydraAuctionOnchain.Errors.Validators.BidderDeposit
+    HydraAuctionOnchain.Errors.Validators.DelegateGroupMetadata
     HydraAuctionOnchain.Errors.Validators.StandingBid
     HydraAuctionOnchain.Helpers
     HydraAuctionOnchain.Lib.Address
@@ -114,12 +116,14 @@ library
     HydraAuctionOnchain.Lib.Serialization
     HydraAuctionOnchain.Lib.Value
     HydraAuctionOnchain.MintingPolicies.Auction
+    HydraAuctionOnchain.MintingPolicies.DelegateGroup
     HydraAuctionOnchain.Scripts
     HydraAuctionOnchain.Types.AuctionEscrowState
     HydraAuctionOnchain.Types.AuctionInfo
     HydraAuctionOnchain.Types.AuctionTerms
     HydraAuctionOnchain.Types.BidderInfo
     HydraAuctionOnchain.Types.BidTerms
+    HydraAuctionOnchain.Types.DelegateGroupInfo
     HydraAuctionOnchain.Types.DelegateInfo
     HydraAuctionOnchain.Types.Error
     HydraAuctionOnchain.Types.Scripts
@@ -128,6 +132,7 @@ library
     HydraAuctionOnchain.Validators.AuctionEscrow
     HydraAuctionOnchain.Validators.AuctionMetadata
     HydraAuctionOnchain.Validators.BidderDeposit
+    HydraAuctionOnchain.Validators.DelegateGroupMetadata
     HydraAuctionOnchain.Validators.StandingBid
 
   build-depends:
diff --git a/src/HydraAuctionOnchain/Errors/MintingPolicies/DelegateGroup.hs b/src/HydraAuctionOnchain/Errors/MintingPolicies/DelegateGroup.hs
new file mode 100644
index 0000000..b41e156
--- /dev/null
+++ b/src/HydraAuctionOnchain/Errors/MintingPolicies/DelegateGroup.hs
@@ -0,0 +1,31 @@
+module HydraAuctionOnchain.Errors.MintingPolicies.DelegateGroup
+  ( PDelegateGroupMpError (..)
+  ) where
+
+import Data.Universe (Universe (universe), universeGeneric)
+import HydraAuctionOnchain.Types.Error (ErrorCodePrefix (errorCodePrefix))
+
+data PDelegateGroupMpError (s :: S)
+  = -- Common errors
+    DelegateGroupMp'Error'MissingOwnCurrencySymbol
+  | -- MintDelegateGroup errors
+    DelegateGroupMp'Mint'Error'DelegateGroupTokenNotMinted
+  | DelegateGroupMp'Mint'Error'MissingUtxoNonceInput
+  | DelegateGroupMp'Mint'Error'MissingMetadataOutput
+  | DelegateGroupMp'Mint'Error'MetadataOutputMissingToken
+  | DelegateGroupMp'Mint'Error'FailedToDecodeDelegateGroupInfo
+  | DelegateGroupMp'Mint'Error'DelegateGroupCurrencySymbolMismatch
+  | DelegateGroupMp'Mint'Error'MissingDelegateSignatures
+  | -- BurnDelegateGroup errors
+    DelegateGroupMp'Burn'Error'DelegateGroupTokenNotBurned
+  deriving stock (Generic, Eq)
+  deriving anyclass (PlutusType)
+
+instance DerivePlutusType PDelegateGroupMpError where
+  type DPTStrat _ = PlutusTypeScott
+
+instance Universe (PDelegateGroupMpError s) where
+  universe = universeGeneric
+
+instance ErrorCodePrefix (PDelegateGroupMpError s) where
+  errorCodePrefix = "DGMP"
diff --git a/src/HydraAuctionOnchain/Errors/Validators/DelegateGroupMetadata.hs b/src/HydraAuctionOnchain/Errors/Validators/DelegateGroupMetadata.hs
new file mode 100644
index 0000000..22d6199
--- /dev/null
+++ b/src/HydraAuctionOnchain/Errors/Validators/DelegateGroupMetadata.hs
@@ -0,0 +1,22 @@
+module HydraAuctionOnchain.Errors.Validators.DelegateGroupMetadata
+  ( PDelegateGroupMetadataError (..)
+  ) where
+
+import Data.Universe (Universe (universe), universeGeneric)
+import HydraAuctionOnchain.Types.Error (ErrorCodePrefix (errorCodePrefix))
+
+data PDelegateGroupMetadataError (s :: S)
+  = -- RemoveDelegateGroup errors
+    DelegateGroupMetadata'Remove'Error'MetadataOutputMissingToken
+  | DelegateGroupMetadata'Remove'Error'DelegateGroupTokenNotBurned
+  deriving stock (Generic, Eq)
+  deriving anyclass (PlutusType)
+
+instance DerivePlutusType PDelegateGroupMetadataError where
+  type DPTStrat _ = PlutusTypeScott
+
+instance Universe (PDelegateGroupMetadataError s) where
+  universe = universeGeneric
+
+instance ErrorCodePrefix (PDelegateGroupMetadataError s) where
+  errorCodePrefix = "DGMD"
diff --git a/src/HydraAuctionOnchain/MintingPolicies/DelegateGroup.hs b/src/HydraAuctionOnchain/MintingPolicies/DelegateGroup.hs
new file mode 100644
index 0000000..de03d10
--- /dev/null
+++ b/src/HydraAuctionOnchain/MintingPolicies/DelegateGroup.hs
@@ -0,0 +1,139 @@
+{-# LANGUAGE TemplateHaskell #-}
+
+module HydraAuctionOnchain.MintingPolicies.DelegateGroup
+  ( delegateGroupMintingPolicy
+  ) where
+
+import HydraAuctionOnchain.Errors.MintingPolicies.DelegateGroup (PDelegateGroupMpError (..))
+import HydraAuctionOnchain.Helpers (pdecodeInlineDatum, pfindUniqueOutputWithScriptHash)
+import HydraAuctionOnchain.Lib.ScriptContext (pownCurrencySymbol)
+import HydraAuctionOnchain.Types.DelegateGroupInfo (PDelegateGroupInfo)
+import HydraAuctionOnchain.Types.Error (errCode, passert, passertMaybe)
+import HydraAuctionOnchain.Types.Tokens
+  ( delegateGroupTokenName
+  , ptxOutContainsDelegateGroupToken
+  )
+import Plutarch.Api.V1.AssocMap qualified as Map (plookup, psingleton)
+import Plutarch.Api.V1.Value (pnormalize)
+import Plutarch.Api.V2 (PCurrencySymbol, PScriptContext, PScriptHash, PTxOutRef)
+import Plutarch.Extra.Maybe (pisJust, pjust)
+import Plutarch.Extra.ScriptContext (pfindTxInByTxOutRef, ptxSignedBy)
+import Plutarch.Monadic qualified as P
+
+data PDelegateGroupMpRedeemer (s :: S)
+  = MintDelegateGroupRedeemer (Term s (PDataRecord '[]))
+  | BurnDelegateGroupRedeemer (Term s (PDataRecord '[]))
+  deriving stock (Generic)
+  deriving anyclass (PlutusType, PIsData, PShow, PEq)
+
+instance DerivePlutusType PDelegateGroupMpRedeemer where
+  type DPTStrat _ = PlutusTypeData
+
+delegateGroupMintingPolicy
+  :: Term
+      s
+      ( PScriptHash
+          :--> PTxOutRef
+          :--> PDelegateGroupMpRedeemer
+          :--> PScriptContext
+          :--> PUnit
+      )
+delegateGroupMintingPolicy = phoistAcyclic $
+  plam $ \delegateGroupMetadataSh nonceOref redeemer ctx -> P.do
+    -- Script purpose should contain own currency symbol. Always
+    -- true for minting policies.
+    delegateGroupCs <-
+      plet $
+        passertMaybe
+          $(errCode DelegateGroupMp'Error'MissingOwnCurrencySymbol)
+          (pownCurrencySymbol # ctx)
+
+    pmatch redeemer $ \case
+      MintDelegateGroupRedeemer _ ->
+        pcheckMintDelegateGroup
+          # delegateGroupMetadataSh
+          # nonceOref
+          # ctx
+          # delegateGroupCs
+      BurnDelegateGroupRedeemer _ ->
+        pcheckBurnDelegateGroup
+          # ctx
+          # delegateGroupCs
+
+pcheckMintDelegateGroup
+  :: Term
+      s
+      ( PScriptHash
+          :--> PTxOutRef
+          :--> PScriptContext
+          :--> PCurrencySymbol
+          :--> PUnit
+      )
+pcheckMintDelegateGroup = phoistAcyclic $
+  plam $ \delegateGroupMetadataSh nonceOref ctx delegateGroupCs -> P.do
+    txInfo <- plet $ pfield @"txInfo" # ctx
+    txInfoFields <- pletFields @["inputs", "mint", "signatories"] txInfo
+    mintValue <- plet $ pnormalize # txInfoFields.mint
+
+    -- The delegate group token should be minted.
+    -- No other tokens should be minted or burned using this policy.
+    passert $(errCode DelegateGroupMp'Mint'Error'DelegateGroupTokenNotMinted) $
+      (Map.plookup # delegateGroupCs # pto mintValue)
+        #== (pjust #$ Map.psingleton # delegateGroupTokenName # 1)
+
+    -- The utxo nonce parameter of the minting policy should be a
+    -- reference to a utxo input spent by the transaction.
+    passert $(errCode DelegateGroupMp'Mint'Error'MissingUtxoNonceInput) $
+      pisJust #$ pfindTxInByTxOutRef # nonceOref # txInfoFields.inputs
+
+    -- There should be exactly one delegate group metadata output.
+    delegateGroupMetadataOutput <-
+      plet $
+        passertMaybe
+          $(errCode DelegateGroupMp'Mint'Error'MissingMetadataOutput)
+          (pfindUniqueOutputWithScriptHash # delegateGroupMetadataSh # txInfo)
+
+    -- The delegate group metadata output should contain a delegate group
+    -- metadata token.
+    passert $(errCode DelegateGroupMp'Mint'Error'MetadataOutputMissingToken) $
+      ptxOutContainsDelegateGroupToken
+        # delegateGroupCs
+        # delegateGroupMetadataOutput
+
+    -- The delegate group metadata output contains a datum that can be
+    -- decoded as a delegate group info metadata record.
+    (delegateGroupInfo :: Term s PDelegateGroupInfo) <-
+      plet $
+        passertMaybe
+          $(errCode DelegateGroupMp'Mint'Error'FailedToDecodeDelegateGroupInfo)
+          (pdecodeInlineDatum # delegateGroupMetadataOutput)
+
+    -- The metadata record should contain an ID that matches the currency symbol
+    -- of this minting policy.
+    delegateGroupInfoFields <-
+      pletFields
+        @["delegateGroupId", "delegateGroupMasterKeys"]
+        delegateGroupInfo
+    passert $(errCode DelegateGroupMp'Mint'Error'DelegateGroupCurrencySymbolMismatch) $
+      delegateGroupInfoFields.delegateGroupId #== delegateGroupCs
+
+    -- The transaction should be signed by the delegate master keys.
+    passert $(errCode DelegateGroupMp'Mint'Error'MissingDelegateSignatures) $
+      pall
+        # plam (\sig -> ptxSignedBy # txInfoFields.signatories # sig)
+        # delegateGroupInfoFields.delegateGroupMasterKeys
+
+    pcon PUnit
+
+pcheckBurnDelegateGroup :: Term s (PScriptContext :--> PCurrencySymbol :--> PUnit)
+pcheckBurnDelegateGroup = phoistAcyclic $
+  plam $ \ctx delegateGroupCs -> P.do
+    mintValue <- plet $ pnormalize #$ pfield @"mint" #$ pfield @"txInfo" # ctx
+
+    -- The delegate group metadata token should be burned.
+    -- No other tokens should be minted or burned.
+    passert $(errCode DelegateGroupMp'Burn'Error'DelegateGroupTokenNotBurned) $
+      (Map.plookup # delegateGroupCs # pto mintValue)
+        #== (pjust #$ Map.psingleton # delegateGroupTokenName # (-1))
+
+    pcon PUnit
diff --git a/src/HydraAuctionOnchain/Scripts.hs b/src/HydraAuctionOnchain/Scripts.hs
index 7245271..72a3dab 100644
--- a/src/HydraAuctionOnchain/Scripts.hs
+++ b/src/HydraAuctionOnchain/Scripts.hs
@@ -8,6 +8,10 @@ module HydraAuctionOnchain.Scripts
   , bidderDepositValidatorScript
   , bidderDepositValidatorUntyped
   , compileScript
+  , delegateGroupMintingPolicyScript
+  , delegateGroupMintingPolicyUntyped
+  , delegateGroupMetadataValidatorScript
+  , delegateGroupMetadataValidatorUntyped
   , standingBidValidatorScript
   , standingBidValidatorUntyped
   , writeScript
@@ -16,6 +20,7 @@ module HydraAuctionOnchain.Scripts
 import Data.Text (Text)
 import Data.Text qualified as T (unpack)
 import HydraAuctionOnchain.MintingPolicies.Auction (auctionMintingPolicy)
+import HydraAuctionOnchain.MintingPolicies.DelegateGroup (delegateGroupMintingPolicy)
 import HydraAuctionOnchain.Types.AuctionTerms (PAuctionTerms)
 import HydraAuctionOnchain.Types.Scripts
   ( PAuctionEscrowScriptHash
@@ -25,6 +30,7 @@ import HydraAuctionOnchain.Types.Scripts
 import HydraAuctionOnchain.Validators.AuctionEscrow (auctionEscrowValidator)
 import HydraAuctionOnchain.Validators.AuctionMetadata (auctionMetadataValidator)
 import HydraAuctionOnchain.Validators.BidderDeposit (bidderDepositValidator)
+import HydraAuctionOnchain.Validators.DelegateGroupMetadata (delegateGroupMetadataValidator)
 import HydraAuctionOnchain.Validators.StandingBid (standingBidValidator)
 import Plutarch (Config (Config), Script, TracingMode (DoTracing), compile)
 import Plutarch.Api.V2 (PCurrencySymbol, PMintingPolicy, PScriptHash, PTxOutRef, PValidator)
@@ -141,6 +147,42 @@ auctionMetadataValidatorUntyped = phoistAcyclic $
 auctionMetadataValidatorScript :: Script
 auctionMetadataValidatorScript = compileScript auctionMetadataValidatorUntyped
 
+----------------------------------------------------------------------
+-- DelegateGroup MP
+
+delegateGroupMintingPolicyUntyped
+  :: ClosedTerm
+      ( PAsData PScriptHash
+          :--> PAsData PTxOutRef
+          :--> PMintingPolicy
+      )
+delegateGroupMintingPolicyUntyped = phoistAcyclic $
+  plam $ \delegateGroupMetadataSh nonceOref redeemer ctx ->
+    popaque $
+      delegateGroupMintingPolicy
+        # pfromData delegateGroupMetadataSh
+        # pfromData nonceOref
+        # punsafeCoerce redeemer
+        # ctx
+
+delegateGroupMintingPolicyScript :: Script
+delegateGroupMintingPolicyScript = compileScript delegateGroupMintingPolicyUntyped
+
+----------------------------------------------------------------------
+-- DelegateGroupMetadata
+
+delegateGroupMetadataValidatorUntyped :: ClosedTerm PValidator
+delegateGroupMetadataValidatorUntyped = phoistAcyclic $
+  plam $ \datum redeemer ctx ->
+    popaque $
+      delegateGroupMetadataValidator
+        # punsafeCoerce datum
+        # punsafeCoerce redeemer
+        # ctx
+
+delegateGroupMetadataValidatorScript :: Script
+delegateGroupMetadataValidatorScript = compileScript delegateGroupMetadataValidatorUntyped
+
 --
 
 config :: Config
diff --git a/src/HydraAuctionOnchain/Types/AuctionTerms.hs b/src/HydraAuctionOnchain/Types/AuctionTerms.hs
index 0069f56..9083894 100644
--- a/src/HydraAuctionOnchain/Types/AuctionTerms.hs
+++ b/src/HydraAuctionOnchain/Types/AuctionTerms.hs
@@ -6,6 +6,7 @@ module HydraAuctionOnchain.Types.AuctionTerms
   , pcleanupPeriod
   , ppostBiddingPeriod
   , ppostPurchasePeriod
+  , pprePurchasePeriod
   , ppurchasePeriod
   , ptotalAuctionFees
   , pvalidateAuctionTerms
@@ -27,7 +28,7 @@ import Plutarch.Api.V2
   )
 import Plutarch.DataRepr (PDataFields)
 import Plutarch.Extra.Field (pletAll)
-import Plutarch.Extra.Interval qualified as Interval (pfrom)
+import Plutarch.Extra.Interval qualified as Interval (pfrom, pto)
 import Plutarch.Extra.Maybe (pisJust)
 import Plutarch.Extra.Value (padaOf)
 import Plutarch.Monadic qualified as P
@@ -161,6 +162,11 @@ ppostBiddingPeriod = phoistAcyclic $
   plam $ \auctionTerms ->
     Interval.pfrom #$ pfield @"biddingEnd" # auctionTerms
 
+pprePurchasePeriod :: Term s (PAuctionTerms :--> PPOSIXTimeRange)
+pprePurchasePeriod = phoistAcyclic $
+  plam $ \auctionTerms ->
+    Interval.pto #$ pfield @"biddingEnd" # auctionTerms
+
 ppostPurchasePeriod :: Term s (PAuctionTerms :--> PPOSIXTimeRange)
 ppostPurchasePeriod = phoistAcyclic $
   plam $ \auctionTerms ->
diff --git a/src/HydraAuctionOnchain/Types/DelegateGroupInfo.hs b/src/HydraAuctionOnchain/Types/DelegateGroupInfo.hs
new file mode 100644
index 0000000..85260d9
--- /dev/null
+++ b/src/HydraAuctionOnchain/Types/DelegateGroupInfo.hs
@@ -0,0 +1,27 @@
+module HydraAuctionOnchain.Types.DelegateGroupInfo
+  ( PDelegateGroupInfo (PDelegateGroupInfo)
+  ) where
+
+import HydraAuctionOnchain.Types.DelegateInfo (PDelegateInfo)
+import Plutarch.Api.V2 (PCurrencySymbol, PPubKeyHash)
+import Plutarch.DataRepr (PDataFields)
+
+newtype PDelegateGroupInfo (s :: S)
+  = PDelegateGroupInfo
+      ( Term
+          s
+          ( PDataRecord
+              '[ "delegateGroupId" ':= PCurrencySymbol
+               , "delegateGroupMasterKeys" ':= PBuiltinList (PAsData PPubKeyHash)
+               , "delegateGroupServers" ':= PDelegateInfo
+               , "delegateGroupMetadata" ':= PByteString
+               ]
+          )
+      )
+  deriving stock (Generic)
+  deriving anyclass (PlutusType, PIsData, PDataFields, PShow, PEq)
+
+instance DerivePlutusType PDelegateGroupInfo where
+  type DPTStrat _ = PlutusTypeData
+
+instance PTryFrom PData PDelegateGroupInfo
diff --git a/src/HydraAuctionOnchain/Types/Tokens.hs b/src/HydraAuctionOnchain/Types/Tokens.hs
index 25b343f..4a4bd93 100644
--- a/src/HydraAuctionOnchain/Types/Tokens.hs
+++ b/src/HydraAuctionOnchain/Types/Tokens.hs
@@ -1,12 +1,14 @@
 module HydraAuctionOnchain.Types.Tokens
   ( auctionEscrowTokenName
   , auctionMetadataTokenName
+  , delegateGroupTokenName
   , pauctionTokenBundleBurned
   , pauctionTokenBundleMinted
   , pauctionTokenBundleValueBurned
   , pauctionTokenBundleValueMinted
   , ptxOutContainsAuctionEscrowToken
   , ptxOutContainsAuctionMetadataToken
+  , ptxOutContainsDelegateGroupToken
   , ptxOutContainsStandingBidToken
   , standingBidTokenName
   ) where
@@ -35,25 +37,34 @@ auctionMetadataTokenName = pconstant "AUCTION_METADATA"
 standingBidTokenName :: Term s PTokenName
 standingBidTokenName = pconstant "STANDING_BID"
 
-ptxOutContainsAuctionToken :: Term s (PCurrencySymbol :--> PTokenName :--> PTxOut :--> PBool)
-ptxOutContainsAuctionToken = phoistAcyclic $
+-- | Delegate group token, identifying the true delegate group.
+delegateGroupTokenName :: Term s PTokenName
+delegateGroupTokenName = pconstant "DELEGATE_GROUP"
+
+ptxOutContainsToken :: Term s (PCurrencySymbol :--> PTokenName :--> PTxOut :--> PBool)
+ptxOutContainsToken = phoistAcyclic $
   plam $ \auctionCs tn txOut ->
     (pvalueOf # (pfield @"value" # txOut) # auctionCs # tn) #== 1
 
 ptxOutContainsAuctionMetadataToken :: Term s (PCurrencySymbol :--> PTxOut :--> PBool)
 ptxOutContainsAuctionMetadataToken = phoistAcyclic $
   plam $ \auctionCs txOut ->
-    ptxOutContainsAuctionToken # auctionCs # auctionMetadataTokenName # txOut
+    ptxOutContainsToken # auctionCs # auctionMetadataTokenName # txOut
 
 ptxOutContainsAuctionEscrowToken :: Term s (PCurrencySymbol :--> PTxOut :--> PBool)
 ptxOutContainsAuctionEscrowToken = phoistAcyclic $
   plam $ \auctionCs txOut ->
-    ptxOutContainsAuctionToken # auctionCs # auctionEscrowTokenName # txOut
+    ptxOutContainsToken # auctionCs # auctionEscrowTokenName # txOut
 
 ptxOutContainsStandingBidToken :: Term s (PCurrencySymbol :--> PTxOut :--> PBool)
 ptxOutContainsStandingBidToken = phoistAcyclic $
   plam $ \auctionCs txOut ->
-    ptxOutContainsAuctionToken # auctionCs # standingBidTokenName # txOut
+    ptxOutContainsToken # auctionCs # standingBidTokenName # txOut
+
+ptxOutContainsDelegateGroupToken :: Term s (PCurrencySymbol :--> PTxOut :--> PBool)
+ptxOutContainsDelegateGroupToken = phoistAcyclic $
+  plam $ \delegateGroupCs txOut ->
+    ptxOutContainsToken # delegateGroupCs # delegateGroupTokenName # txOut
 
 ----------------------------------------------------------------------
 -- Token bundle
diff --git a/src/HydraAuctionOnchain/Validators/DelegateGroupMetadata.hs b/src/HydraAuctionOnchain/Validators/DelegateGroupMetadata.hs
new file mode 100644
index 0000000..91ca1ab
--- /dev/null
+++ b/src/HydraAuctionOnchain/Validators/DelegateGroupMetadata.hs
@@ -0,0 +1,73 @@
+{-# LANGUAGE TemplateHaskell #-}
+
+module HydraAuctionOnchain.Validators.DelegateGroupMetadata
+  ( delegateGroupMetadataValidator
+  ) where
+
+import HydraAuctionOnchain.Errors.Validators.DelegateGroupMetadata
+  ( PDelegateGroupMetadataError (..)
+  )
+import HydraAuctionOnchain.Types.DelegateGroupInfo (PDelegateGroupInfo)
+import HydraAuctionOnchain.Types.Error (errCode, passert)
+import HydraAuctionOnchain.Types.Tokens
+  ( delegateGroupTokenName
+  , ptxOutContainsDelegateGroupToken
+  )
+import Plutarch.Api.V1.AssocMap qualified as Map (plookup, psingleton)
+import Plutarch.Api.V1.Value (pnormalize)
+import Plutarch.Api.V2 (PScriptContext)
+import Plutarch.Extra.Maybe (pjust)
+import Plutarch.Extra.ScriptContext (ptryOwnInput)
+import Plutarch.Monadic qualified as P
+
+data PDelegateGroupMetadataRedeemer (s :: S)
+  = RetireDelegateGroupRedeemer (Term s (PDataRecord '[]))
+  deriving stock (Generic)
+  deriving anyclass (PlutusType, PIsData, PShow, PEq)
+
+instance DerivePlutusType PDelegateGroupMetadataRedeemer where
+  type DPTStrat _ = PlutusTypeData
+
+delegateGroupMetadataValidator
+  :: Term
+      s
+      ( PDelegateGroupInfo
+          :--> PDelegateGroupMetadataRedeemer
+          :--> PScriptContext
+          :--> PUnit
+      )
+delegateGroupMetadataValidator = phoistAcyclic $
+  plam $ \delegateGroupInfo redeemer ctx ->
+    pmatch redeemer $ \case
+      RetireDelegateGroupRedeemer _ ->
+        pcheckRetireDelegateGroup
+          # delegateGroupInfo
+          # ctx
+
+pcheckRetireDelegateGroup
+  :: Term
+      s
+      ( PDelegateGroupInfo
+          :--> PScriptContext
+          :--> PUnit
+      )
+pcheckRetireDelegateGroup = phoistAcyclic $
+  plam $ \delegateGroupInfo ctx -> P.do
+    delegateGroupCs <- plet $ pfield @"delegateGroupId" # delegateGroupInfo
+
+    -- The metadata output must contain exactly one delegate group
+    -- metadata token.
+    delegateGroupMetadataOutput <- plet $ pfield @"resolved" #$ ptryOwnInput # ctx
+    passert $(errCode DelegateGroupMetadata'Remove'Error'MetadataOutputMissingToken) $
+      ptxOutContainsDelegateGroupToken
+        # delegateGroupCs
+        # delegateGroupMetadataOutput
+
+    -- The delegate group metadata token should be burned.
+    -- No other tokens should be minted or burned.
+    mintValue <- plet $ pnormalize #$ pfield @"mint" #$ pfield @"txInfo" # ctx
+    passert $(errCode DelegateGroupMetadata'Remove'Error'DelegateGroupTokenNotBurned) $
+      (Map.plookup # delegateGroupCs # pto mintValue)
+        #== (pjust #$ Map.psingleton # delegateGroupTokenName # (-1))
+
+    pcon PUnit
diff --git a/src/HydraAuctionOnchain/Validators/StandingBid.hs b/src/HydraAuctionOnchain/Validators/StandingBid.hs
index 5a05ece..8ae7334 100644
--- a/src/HydraAuctionOnchain/Validators/StandingBid.hs
+++ b/src/HydraAuctionOnchain/Validators/StandingBid.hs
@@ -15,7 +15,11 @@ import HydraAuctionOnchain.Helpers
   , putxoAddress
   )
 import HydraAuctionOnchain.Lib.ScriptContext (pinputSpentWithRedeemer)
-import HydraAuctionOnchain.Types.AuctionTerms (PAuctionTerms, pbiddingPeriod)
+import HydraAuctionOnchain.Types.AuctionTerms
+  ( PAuctionTerms
+  , pbiddingPeriod
+  , pprePurchasePeriod
+  )
 import HydraAuctionOnchain.Types.Error (errCode, passert, passertMaybe)
 import HydraAuctionOnchain.Types.StandingBidState (PStandingBidState, pvalidateNewBid)
 import HydraAuctionOnchain.Types.Tokens
@@ -128,11 +132,11 @@ pcheckNewBid = phoistAcyclic $
     passert $(errCode StandingBid'NewBid'Error'InvalidNewBidState) $
       pvalidateNewBid # auctionCs # auctionTerms # oldBidState # newBidState
 
-    -- (STBD8) This redeemer can only be used during
-    -- the bidding period.
+    -- (STBD8) This redeemer can only be used before
+    -- the bidding end time.
     txInfoValidRange <- plet $ pfield @"validRange" # txInfo
     passert $(errCode StandingBid'NewBid'Error'IncorrectValidityInterval) $
-      pcontains # (pbiddingPeriod # auctionTerms) # txInfoValidRange
+      pcontains # (pprePurchasePeriod # auctionTerms) # txInfoValidRange
 
     pcon PUnit