The requesting field office (FO) is responsible for payments to custodians for purchased
evidence, except when making the request by using the SSA-562-U3 (Request for Assistance
Certification) through offices servicing the custodian. When the parallel FO must
make contact with the custodian, the parallel FO will be responsible for payment to
the custodian using its own common accounting number (CAN). Make payment for purchased
evidence under existing procedures using SSA's third party draft system.