The formalities officer is entrusted with fixing the amount of the costs to be paid to the beneficiary at the request of at least one party. The request from a party to the proceedings to fix the costs is admissible only if the decision in which the apportionment of costs was ordered has become final.[Art. 104(2); Rule 88(2); ]

A list of costs, with supporting evidence in respect of each amount involved, must be attached to the request. Costs may be fixed once their credibility is established.[Rule 88(2); ]

The parties will be notified of the costs as fixed by the formalities officer acting for the opposition division.[Art. 119; ]

For an explanation of the duties entrusted to the formalities officers, see D‑II, 7.