202.03(a)(i)    Processing Fee for Payment Refused or Charged Back by Financial Institution

There is a fee for processing any payment refused (including a check returned unpaid for a permitted paper filing (see TMEP §301.01) or charged back by a financial institution.  37 C.F.R. §2.6(b)(10) ); see TMEP §405.06.  However, payment of the processing fee is not a filing date requirement.  If an applicant resubmits the filing fee without paying the processing fee, the USPTO will give the application a filing date as of the date of resubmission, and the examining attorney will require submission of the processing fee during examination.