Filing of applications electronically 

An international application may be filed electronically with the EPO as receiving Office.

The EPO offers the following free-of-charge electronic filing tools:

Online Filing (OLF), a software application 
the case management system (CMS) 
Web-Form Filing 

In addition, applicants may use ePCT, an electronic filing tool offered by WIPO. offers the following electronic filing options:


The EPO no longer accepts international applications filed with it as receiving Office using the PCT-SAFE filing software. This has been the case since 1 July 2020.

Filings using the OLF software may be made online or on electronic data carriers accepted by the EPO. At present, the data carriers accepted are CD-Rs conforming to ISO 9660, DVD-Rs and DVD+Rs.

OJ SE 3/2007, A.5

All the means of electronic filing, except for the Web-Form Filing service, allow applicants to fill in the PCT request form (PCT/RO/101) directly in the electronic document formats that are accepted by the EPO as receiving Office.

If the documents making up the international application have been prepared by conversion from a different electronic document format (pre-conversion format), the applicant may submit the documents in that format too, preferably together with a statement that the international application in electronic form is a complete and accurate copy of the documents in pre-conversion format. Each pre-conversion document must be in a format that fulfils the requirements stipulated in Special edition No. 3 of OJ EPO 2007, A.5. It is recommended that pre-conversion documents be submitted as ZIP files.

AI 706
OJ SE 3/2007, A.5

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