12 C.F.R. § 617.7300
Each qualified lender must make its decision on a loan application as quickly as possible. The qualified lender must provide prompt written notice of its decision to the applicant. The qualified lender is required to notify all primary applicants. If a loan application has more than one primary applicant, the qualified lender may send the original notice to the applicant designated to receive notices and may send copies to all other applicants. If the qualified lender makes an adverse credit decision on a loan application, the notice must include: