There are several benefits to going the extra mile and getting a pre-approval letter. First of all, you will know exactly how much real estate you can afford. When you find a property you want to buy, your offer will be in a better positioned than someone less prepared. Finally, being pre-approved is more efficient; it reduces the amount of time it will take your lender to fund your loan. Be prepared to provide comprehensive documentation, which the lender may independently verify, including but not limited to: