See also

  • Warning
    Beware of approaches and requests for payment from firms purporting to register European patents

Opposition services

Every year the EPO carries out user satisfaction surveys on its search, examination and opposition services, including formalities services.

We run these surveys so that we can

  • measure user satisfaction with our search, examination and opposition services
  • obtain input to enable us to review the quality and efficiency of our internal processes in these areas

The surveys are carried out on behalf of the EPO by a contractor. For the period 2018 - 2020, the contractor is BERENT Deutschland GmbH.


This survey takes the form of telephone interviews of about 15 minutes in duration.

For each technical area being surveyed, the EPO selects opposition cases finished in the previous 12 months and creates a list of survey respondents which it forwards to the survey company.

Respondents are asked about their experiences of dealing with the EPO in the previous 12 months, both in general terms and in relation to a specific opposition case.

Once the survey has been completed the contractor reports the results to the EPO.

Data is grouped and analysed on a purely statistical basis. Aggregated results are reported to senior EPO management and to the directors of the technical areas concerned.


The survey on opposition services is carried out annually.


For more information, or if you do not wish to participate in these surveys, please write to

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