1902.08(c) Fees for Subsequent Designation
USPTO Transmittal Fee. The subsequent designation must include the USPTO transmittal fee, or the USPTO will not forward it to the IB. 37 C.F.R. §7.21(a)(7).
International Fees. If the subsequent designation is filed through TEAS, all international fees for the subsequent designation must be paid at the time of submission. 37 C.F.R. §7.21(b)(8). International fees for subsequent designations filed on paper must be paid directly to the IB in Swiss currency, either before or after submission of the subsequent designation. However, international fees paid after the IB receives the subsequent designation could result in a notice of irregularity issued by the IB.
See TMEP §1903.02 regarding payment of international fees.