If a borrower asks to be pre-qualified for a home mortgage and submits all necessary information to make a decision with the exception of a property address (they are shopping for houses), the bank approves the borrower based on the information provided and notifies the borrower verbally of the approval but the borrower never calls back with a specified property, how do you handle these?

Do you leave them open until you receive word from the borrower or do you close it due to incompleteness and send an incomplete notification to the borrower. Just trying to ascertain the best avenue for these requests.