The Department of Housing and Urban Development has issued new rules for qualifying borrowers who list Social Security income on their application for an FHA-insured mortgage loan.The number of FHA borrowers with verified Social Security income is unknown because HUD does not track borrowers’ source of income, according to a department spokesperson. But industry observers said the number may not be significant. Nonetheless, lenders would need to request several important documents from borrowers who would rely on SS income to qualify for an FHA home loan, the new rules state. These documents include ...