Section 308bis Marking of Later Submitted Sheets
The receiving Office shall indelibly mark any sheet containing an element referred to in Article 11 (1)(iii)(d) or (e), or a part referred to in Rule 20.5 (a), received on a date later than the date on which sheets were first received ("later submitted sheet"), in the upper right-hand corner of each sheet, with the international application number referred to in Section 307 and the date of actual receipt of that sheet.