diff --git a/src/content/docs/ssl/edge-certificates/custom-certificates/troubleshooting.mdx b/src/content/docs/ssl/edge-certificates/custom-certificates/troubleshooting.mdx
index f3c10ba36162cb8..4d9110dbb7836e2 100644
--- a/src/content/docs/ssl/edge-certificates/custom-certificates/troubleshooting.mdx
+++ b/src/content/docs/ssl/edge-certificates/custom-certificates/troubleshooting.mdx
@@ -47,6 +47,8 @@ If you are using a Let's Encrypt certificate uploaded by yourself as a custom ce
 
 The certificate you are trying to upload is invalid. For example, there might be extra lines, or the BEGIN/END text is not correct, or extra characters are added following a copy/paste.
 
+In the case of an update with the [PATCH API call](/api/resources/custom_certificates/methods/edit/), it can mean the path parameter `{custom_certificate_id}` is invalid.
+
 **Solution**
 
 Carefully check the content of the certificate. You may use `openssl` to check all the details of your certificate:
@@ -55,6 +57,8 @@ Carefully check the content of the certificate. You may use `openssl` to check a
 openssl x509 -in certificate.crt -noout -text
 ```
 
+When using the API, carefully check the `{custom_certificate_id}` path parameter. You can confirm the certificate ID by [listing the existing custom certificates](/api/resources/custom_certificates/methods/list/) (`id` in the response).
+
 ### You have reached the maximum number of custom certificates. (Code: 1212)
 
 **Root cause**