However, a locked-in rate could also prevent you from taking advantage of price decreases, unless your lender is willing to lock in a lower rate that becomes available during this period. A loan commitment is the lender's promise to make you a loan in a specific amount at some future time. Generally, you will receive the lender's commitment only after your loan application has been approved. Some lenders have preprinted forms that set out the exact terms of the lock-in agreement. Others may only make an oral lock-in promise on the telephone or at the time of application.
Oral agreements can be very difficult to prove in the event of a dispute.
Some lenders' lock-in forms may contain crucial information that is difficult to understand or that is in fine print.