Bear in mind that there are 2 parts to every mortgage that can be sold post-closing. They are the securitized note and the servicing. While a large portion of the securitized notes in the country will be sold off to Fannie Mae and Freddie Mac, that sale will generally be transparent to the consumer. What is usually implied by the question of sale is the servicing of the loan. While all lenders maintain the right to sell the servicing of your loan after closing, many large banks will maintain a good portion of their portfolios. Your NJ mortgage lender is required to disclose to you the percentage of loan servicing that are sold off post-close. The best idea is to check with your individual loan officer for details. Despite how many times your loan servicing may change hands, however, the terms of the mortgage cannot change by law.