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fenfill is operated by Larksong sp. z o.o., ul. Stefana Batorego 18/108, 02-591 Warszawa, Poland. KRS 0001275290, NIP 7011337480, REGON 546037291. Registry court: Sąd Rejonowy dla m.st. Warszawy w Warszawie, XII Wydział Gospodarczy KRS. Share capital: PLN 5,000.00.