It is acknowledging in writing that the infraction was committed in order to obtain a reduction of the fine (Art. 19). If the acknowledgment is voluntary and made without customs intervention before the requirement is notified, there is no penalty, except for the gravest infractions; if it is voluntary and in writing, before the requirement but with prior customs intervention, the fine is reduced to 20%. After the requirement is notified and until the decision on the merits, it is reduced to 40%; within the term to appeal the decision on the merits, to 60%. You must attach the receipt for payment of the duties and taxes, interest and the reduced penalty. It does not apply to late-payment interest or to the rescue payment, it can be total or partial, and settlements are not recorded in the INFAD (Art. 24, par. 6).