diff --git a/sdjwt/sdjwt.py b/sdjwt/sdjwt.py
index 8cddc05..40906e0 100644
--- a/sdjwt/sdjwt.py
+++ b/sdjwt/sdjwt.py
@@ -508,6 +508,13 @@ def iterate_mapping(obj, path):
     if terms_of_use:
         vc["termsOfUse"] = terms_of_use
     if credential_metadata:
+        credential_metadata.pop("issuanceDate","")
+        credential_metadata.pop("expirationDate","")
+        credential_metadata.pop("credentialSchema",[])
+        credential_metadata.pop("credentialStatus",{})
+        credential_metadata.pop("credentialSubject",{})
+        credential_metadata.pop("type",[])
+        
         vc.update(credential_metadata)
 
     jwt_credential = create_jwt(
@@ -618,6 +625,13 @@ def iterate_mapping(obj, path):
     if terms_of_use:
         vc["termsOfUse"] = terms_of_use
     if credential_metadata:
+        credential_metadata.pop("issuanceDate","")
+        credential_metadata.pop("expirationDate","")
+        credential_metadata.pop("credentialSchema",[])
+        credential_metadata.pop("credentialStatus",{})
+        credential_metadata.pop("credentialSubject",{})
+        credential_metadata.pop("type",[])
+
         vc.update(credential_metadata)
 
     jwt_credential = create_jwt(