Through a web form, which calls the Salesforce API, the user can submit Case file attachments (along with other Case data fields - such as "contact person"). Once it gets to Salesforce (screen shot below), it seems that the "Created By" name is the name of the authorized Salesforce user for the API. I'm trying to match each attachment to the Case's contact person.
Could this be done through the Salesforce setup panel? I'm looking for something similar to an assignment rule that can edit the name of each attachment's "Created By" field into the "Contact Name" of the Case.