A New York Mortgage Tax Credit Affidavit is a legal document that consists of two parts — a Certificate of Eligibility and a Disclosure Statement. The Certificate of Eligibility is signed by a borrower and lender, and states that the borrower is eligible for a mortgage tax credit in the state of New York. The Disclosure Statement is then signed by the borrower and lender, and sets out the details of the mortgage tax credit, including the amount of the credit, the rate of interest, the term of the loan, and any other pertinent information. There are two types of New York Mortgage Tax Credit Affidavits. The first is the Standard New York Mortgage Tax Credit Affidavit, which is used for all home purchases and refinances. The second is the Enhanced New York Mortgage Tax Credit Affidavit, which is used for purchases of homes in certain designated areas.