KSEF API – API for the National e-Invoice System
Send us a message
Office address
NETCAT – Information Systems
street Zagloby 21/10, 02-495 Warszawa
Poland
contact
customer service office
t: +48 222 199 199
e: kontakt@ksefapi.pl
Monday – Friday, 09:00 – 16:00
Identification of
NIP (EU VAT): PL7272445205
IBAN: PL16105010411000009767051320