All fees which are to be paid to the EPO must be paid in euros:
Supplementary publication 5, OJ EPO 2017
In the event of a general unavailability of the permitted electronic means of communication, the EPO will make use of the extension of time limits for the payment of fees, as for the performance of any other procedural acts, and will inform the IB accordingly.
Payment of fees by cheque delivered or sent directly to the EPO was abolished with effect from 1 April 2008.
OJ EPO 2007, 626