5 CFR 1639.24 - Certification.
(b) The certification must be in writing and must include:
(2) The amount and basis of the debt;
(5) The amount and date of the collection, if only a one-time offset is required;
(6) If the collection is to be made in installments, the number of installments to be collected, the amount of each installment, and the date of the first installment, if a date other than the next officially established pay period is required; and
(7) Information regarding the completion of procedures required by 5 U.S.C. 5514, including the dates of notices and hearings provided to the employee, or, if applicable, the employee's signed consent to salary offset or a signed statement acknowledging receipt of required procedures.