You need a business purpose for pulling the borrower's credit. Prudence would tell you to have some form of acknowledgement (loan application, authorization, PFS, etc.).
When you say "there is no loan application"- are you saying there is no paper application or the borrower has not initiated a request. If the latter, you have an issue.
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Maybe you just wanna fly the plane yourself. Well good luck pressing take off, then auto pilot, then land.
CRCM