AR Transaction Credit Memo creator should not approve his own transactions

Summary:

AR Transaction Credit Memo creator should not approved

Content (required):

Business created credit memo approval in the system. Only few persons approve the credit memo. Few times approver also creates Credit memo and he should not be approving his own Credit memo due to maker/checker for Audit purpose.

Pls suggest how to achieve my requirement.

Version (include the version you are using, if applicable):

23A

Code Snippet (add any code snippets that support your topic, if applicable):