You can start the preapproval process with Mr. Cooper by calling or filling out a form online. Once you provide details about your identity and finances, Mr. Cooper does a soft credit check and provides a preapproval letter showing an amount you generally qualify to borrow. If you’re further along in the process and ready to make an offer, you should seek “verified approval,” which requires a more detailed check of your income and assets and gives you an approval letter to show the seller. Once your offer is accepted, you formally apply for a loan and lock in your interest rate.