Certified Occupancy Specialist (COS) Practice Exam 2026 – Complete Study Resource

HAP stands for Housing Assistance Payments. In COS terminology, HAP responsibilities are the duties involved in administering those payments to landlords on behalf of voucher participants. This includes calculating and issuing the monthly HAP, ensuring timely payments, keeping accurate tenancy and certification records, and handling changes that affect subsidies (like rent adjustments, income changes, or family composition) to stay compliant with program rules. The other options describe different functions that aren’t what HAP refers to, so the term is best understood as the set of responsibilities tied to managing Housing Assistance Payments.