https://www.epo.org/en/service-support/faq/myepo-services/central-fee-payment/submitting-deferring-and-revoking-debit-6

When is a payment deemed to have been received when using Central Fee Payment?

The payment date according to point 10.1 ADA is the date on which the EPO receives the debit order, provided there are sufficient funds in the deposit account. This date normally corresponds to the date the debit order is submitted via Central Fee Payment. The submission date is displayed on the order confirmation that is automatically generated by Central Fee Payment. Once the fees have been effectively debited from your deposit account the status of the order will be changed from submitted to paid.