fa3

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mlkmn / ksef4j

Spring-Boot-first Java client for Poland's KSeF 2.0 e-invoicing (FA(3)): send, read, and UPO handling, with a published test mock. Apache-2.0, on Maven Central.

java spring-boot gradle invoicing tax spring-boot-starter vat invoice poland einvoicing faktura e-invoicing ksef fa3 krajowy-system-e-faktur ksef2

Updated Jul 1, 2026
Java

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