Reg B also states that the customer can be told orally or may request in writing specific reasons for the denial. Your initial notice will state the principal reason for the denial. I think if the Loan Officer, when talking to them explaines why you are unable to grant the loan they'll understand, may not fully appreciate it upfront but will in the long run.
Alternative to providing specific reasons. In lieu of providing a statement of specific reasons, the creditor may disclose in the adverse action notice the applicant’s right to a statement of specific reasons within 30 days, if the statement is requested within 60 days of the creditor’s notification. The disclosure must include the name, address and telephone number of the persons or office from which the statement of reasons can be obtained. If the creditor chooses to provide the reasons orally, the creditor must also disclose the applicant’s right to have them confirmed in writing within 30 days of receiving a written request for confirmation from the applicant.