2.4 Number of copies 

Documents relating to more than one application or patent (e.g. individual or general authorisation) or having to be communicated to more than one party, only need to be filed in one copy (see also A‑VIII, 1.5). However, in the case of letters accompanying submitted documents (in particular EPO Form 1038), a separate copy must be filed for each file to which the document they accompany relates.

For example, where two different applications share a common priority claim, the applicant only needs to file one certified copy of the priority document in one of them., but However, a separate EPO Form 1038 (or cover letter) must be filed in both applications, this must be accompanied by two different letters each relating to one or the other application (preferably using EPO Form 1038). Each EPO Form 1038 (or letter) (or EPO Form 1038) must be duly signed and indicate one or the other of the two application numbers in respect of which the priority document is being filed (see also A‑VIII, 3.1).