Once a bank funds a mortgage can they take it back?

They could pull back the wire if they find something they don't like that would disqualify the loan from being made. As the previous comment said, if it doesn't record for some reason that could be why. Of course, if the lender finds any reason to call the loan they could make you pay it all back and send you a bill for the loan balance. The reasons for why they could legally call a loan will be stated in your loan documents. One reason, for example, is if the borrowers on the loan remove themselves from title after the loan closes since the borrowers are supposed to remain on title.