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Update of API for National e-Invoice System and Taxpayer Application KSeF in Pre-production Environment (Demo)

  • API Krajowego Systemu e-Faktur and Aplikacji Podatnika KSeF will be updated on the pre-production environment (Demo)
  • The update will take place on November 23, 2023, from 11:00 to 21:00
  • The update includes version 2.0.4 of the API Krajowego Systemu e-Faktur, which makes the tradeName field in SubjectNameType optional and optimizes invoice queries
  • The update also includes version 1.4.3 of the Aplikacji Podatnika KSeF, which adds an endpoint to return the current version of the mobile application
  • There may be temporary difficulties in accessing these environments during the update
  • Apologies for any inconvenience caused.


Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.


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