6.3 The filing date changes 

If, after the filing date, the applicant corrects the application documents (or parts) in accordance with the procedures explained in A‑II, 6.1 or A‑II, 6.2, then the erroneously filed documents will be deemed not to have been filed and the correct documents will be added to the application. The filing date changes to the date on which the EPO receives the correct parts. The applicant is informed of the new filing date under Rule 56a(3). This is subject to the exception explained in A‑II, 6.4.

Erroneously filed application documents remain in the file, even if they are considered not part of the application as filed. As such, following publication of the application, the erroneous application documents or parts are open to file inspection (see A‑XI, 2.1 and A‑XI, 2.3).