The Polish Ministry of Finance and Economy published Regulation No. 169 on February 13, 2026, advancing authentication deadlines for entities using the National e-Invoice System (KSeF) by approximately six weeks from the original schedule.
Under the amendments, the use of trusted signatures to authenticate entities using KSeF under transitional provisions became effective from February 13, 2026, instead of the previously scheduled March 31. Additionally, the obligation to use electronic identification for authenticating entities using KSeF now applies from February 14, 2026, rather than April 1.
The regulation entered into force on the date of publication, February 13, 2026. The changes modify provisions in the December 12, 2025 regulation governing the use of the KSeF system, specifically sections 13 and 15 addressing authentication requirements.
The accelerated timeline reflects Poland's commitment to strengthening digital authentication protocols within its mandatory e-invoicing framework. KSeF represents a critical component of Poland's efforts to digitize VAT compliance and enhance tax administration oversight of business-to-business transactions.
