Can PO be received under My Receipts without requester or preparer details?

Summary:

There is a requirement to be able to receive Purchase orders under 'My Receipts' in self service procurement with just PO number and without entering either Requester or entered by details.

Is it possible to make these two fields non mandatory?

Content (required):

There is a requirement to be able to receive Purchase orders under 'My Receipts' in self service procurement with just PO number and without entering either Requester or entered by details.

Is it possible to make these two fields non mandatory?

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

23B

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