Key Number

Key Number

A unique identifier assigned to a Mortgage by Loan Product Advisor® when the Mortgage is first submitted to Loan Product Advisor. The Key Number is returned to the Seller on the Feedback Certificate and is used by the Seller and Freddie Mac to identify an individual Mortgage. In addition to the Key Number, each Loan Product Advisor submission will receive a Transaction Number. Key Number is also referred to as "Loan Prospector® (LP) AUS Key Number" and "LP Key Number." These three terms can be used interchangeably.