From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
counterfoil /kˈaʊntəfˌɔɪl/ [Br.] Abrissabschnitt <masc>, Abriss <masc>, abtrennbarer Abschnitt <masc>, Abschnitt zum Abtrennen, Abrisscoupon <masc> [Dt.] [Schw.] , Coupon <masc> [Dt.] [Schw.] , Abrisskupon <masc> [Ös.] , Kupon <masc> [Ös.] , Talon <masc> [Schw.] , Abrisszettel <masc> [ugs.] Synonyms: coupon, stub, tear-off slip, detachable portion
see: coupons, counterfoils, stubs, detachable portions
From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
counterfoil /kˈaʊntəfˌɔɪl/ [Br.] Kontrollabschnitt <masc>, Kontrollabriss <masc> [adm.] Synonym: stub