What happens if I am using the automatic debiting procedure and the EPO as ISA or IPEA considers that the invention claimed in my PCT application lacks unity?

In non-unity cases the EPO will invite you to pay additional international search or preliminary examination fees. Unless you inform the EPO otherwise, it will debit all such fees on the last day of the one-month time limit (in case of fees 002 and 003, booking will take an additional 10 days).

As a courtesy service, the EPO will inform you separately via email that it has issued such an invitation.