diff --git a/openid-4-verifiable-credential-issuance-1_0.md b/openid-4-verifiable-credential-issuance-1_0.md
index d428c962..e29af3ab 100644
--- a/openid-4-verifiable-credential-issuance-1_0.md
+++ b/openid-4-verifiable-credential-issuance-1_0.md
@@ -388,6 +388,8 @@ Below is a non-normative example of a Credential Offer Object for a Pre-Authoriz
 
 <{{examples/credential_offer_by_reference.json}}
 
+When retrieving Credential Offer from the Credential Offer URL, `application/json` media type MUST be used. The Credential Offer cannot be signed and MUST NOT use `application/jwt` with `"alg": "none"`.
+
 ## Credential Offer Response
 
 The Wallet is not supposed to create a response. UX control stays with the Wallet after completion of the process.