https://www.epo.org/en/service-support/faq/searching-patents/open-patent-services/search-queries-tips-and-tricks/when

When using the Published Data service, why do I get the entire publication cycle even if I don't use the constituent "full cycle"?

If the EPODOC format is used without a kind code, the system will search for all publications matching the publication requested.

Here is an example of request made in EPODOC format:

This will happen for those authorities where the same number identifies multiple publication steps (e.g. EP, WO, FR). In these cases the system will provide all publications that match that specific number. Effectively, the entire publication cycle will be provided. To avoid this, you can either provide a kind code value or use the DOCDB format.