http://www.epo.org/service-support/updates/2017/20170705.html
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Temporary unavailability of Online Fee Payment
The EPO is pleased to inform users of Online
Fee Payment
that a new update will be rolled out on 5 July 2017. The estimated
downtime will be from 18:00 to 23:30 hrs (CET).
No
update is foreseen for the Multipay Tool software.