Credit Memo Request is a document used to create Credit Memo. Before the credit memo is created in the system, the Credit Memo Request should be created (with ref. to the sales order). Credit Memo Request is a place where we can define the values before and after correction, enter the reason for the request, the data to be corrected and then save the document. Credit Memo Request does not generate any account postings and it can be used to verify the Credit Memo Request before Credit Memo is created. As long as the person responsible does not approve the Credit Memo Request for further processing, it can be blocked for billing. Only after unblocking Credit Memo Request we have an ability to create Credit Memo with account postings.