Pay Advances Advance BAH Advance BAH is requested on AF Form 1039. Advance BAH is intended to help defray the costs of moving into a new residence. AF Form 1039 can only be signed by the unit commander. A copy of your lease/rental agreement is required when applying for your advance BAH. Advance Pay Advance Basic Pay is requested on DD Form 2560, IAW DFAS-DEM 177-373, Vol. II, Chapter Six. PCS advance payments provide a member with funds to meet extraordinary expenses incident to a government-ordered relocation. The only person who can authorize advance pay is the Unit Commander. Advance Pay is intended to assist with the out-of-pocket expenses that exceed or precede reimbursements incurred in a duty location change, and are expenses not typical of day-to-day military living.