▁track ▁of ▁those ▁who ▁have ▁written ▁out standing ▁bad ▁checks ▁to ▁any ▁ret ail er ▁using ▁the ▁system , ▁and ▁ret ail ers ▁can ▁determine , ▁based ▁on ▁these ▁records , ▁whether ▁or ▁not ▁to ▁accept ▁a ▁check ▁from ▁a ▁particular ▁acc oun th older . ▁ ▁Ret ail ers ▁using ▁the ▁SC AN ▁system ▁have ▁at ▁least ▁one ▁sc anner ▁in ▁the ▁store , ▁and ▁often ▁one ▁at ▁every ▁register , ▁that ▁is ▁used ▁to ▁scan ▁checks ▁that ▁are ▁written . ▁The ▁sc anner ▁reads ▁the ▁account ▁number ▁and ▁comp ares ▁it ▁with ▁the ▁database ▁of ▁checking ▁account ▁numbers ▁for ▁which ▁bad ▁checks ▁have ▁been ▁written ▁to ▁any ▁particip ating ▁ret ail er ▁and ▁not ▁rep a id . ▁If ▁the ▁account ▁number ▁matches ▁one ▁in ▁the ▁system , ▁the ▁ret ail er ▁will ▁be ▁not ified , ▁and ▁will ▁not ▁likely ▁accept ▁the ▁check . ▁ ▁SC AN ▁also ▁oper ates ▁a ▁collection ▁service ▁on ▁bad ▁checks ▁that ▁are ▁written . ▁ ▁See ▁also ▁Bad ▁check ▁rest itution ▁program ▁Check ▁fra ud ▁Che x System s ▁ ▁External ▁links ▁ ▁Category : Che ques ▁Category : Non - su fficient ▁funds <0x0A> </s> ▁La ▁Jag ua ▁de ▁I bir ico ▁( (), ▁literally ▁" The ▁Jag ua ▁of ▁I bir ico ") ▁is ▁a ▁town ▁and ▁municipality ▁in ▁the ▁Department ▁of ▁Ces ar , ▁Colombia . ▁This ▁region ▁of ▁La ▁Jag ua ▁is ▁rich ▁in ▁coal ▁which ▁is ▁explo ited ▁extens ively ▁and ▁is ▁second ▁only ▁to ▁El ▁Cer re jon