" FAQ p481efs078 - USPTO "

How do I pay the fee for preparation of the certified copy of the priority document by the RO/US in my PCT application?

You may pay the priority document fee by submitting the fee calculation sheet and authorizing payment by deposit account.  You may also fax or mail the fee calculation sheet and Form PTO-2038 if paying by credit card.  Do NOT attach Form PTO-2038 to your EFS-Web submission.  Of course you can also pay by check via mail.

USPTO FAQ - Questions and Answers (07JAN2007)