iss ued ▁driver ' s ▁license , ▁pass port ▁or , ▁for ▁min ors , ▁a ▁birth ▁certificate . ▁Each ▁card ▁has ▁a ▁unique ▁R G ▁number . ▁ ▁Brazil ian ▁identity ▁cards ▁can ▁be ▁used ▁as ▁travel ▁documents ▁to ▁enter ▁the ▁Mer cos ur ▁members ▁and ▁associated ▁countries ▁( except ▁Guy ana ▁and ▁Sur in ame ). ▁ ▁Iss u ance ▁Having ▁and ▁carrying ▁an ▁R G ▁card ▁is ▁not ▁comp uls ory ▁under ▁law , ▁but ▁it ▁is ▁comp uls ory ▁to ▁carry ▁some ▁form ▁of ▁identification , ▁so ▁it ▁is ▁common ▁for ▁all ▁citizens ▁to ▁have ▁and ▁carry ▁one . ▁ ▁Its ▁issu ance ▁is ▁the ▁responsibility ▁of ▁the ▁govern ments ▁of ▁the ▁feder ative ▁units ▁of ▁Brazil ▁and ▁are ▁valid ▁nation wide . ▁There ▁is ▁no ▁legal ▁restriction ▁on ▁having ▁more ▁than ▁one ▁identity ▁card , ▁provided ▁each ▁one ▁is ▁issued ▁by ▁a ▁different ▁feder ative ▁units . ▁ ▁The ▁documents ▁required ▁to ▁obtain ing ▁an ▁identity ▁card ▁depend ▁on ▁whether ▁the ▁applic ant ▁is ▁single , ▁married ▁or ▁natural ized . ▁Single ▁people ▁need ▁a ▁birth ▁certificate ▁( the ▁original ▁or ▁a ▁cert ified ▁copy ), ▁while ▁married ▁people ▁can ▁use ▁their ▁marriage ▁certificate , ▁and ▁natural ized ▁people ▁can ▁use ▁a ▁natural ization ▁certificate . ▁An ▁applic ant ' s ▁C PF ▁number ▁can ▁be ▁printed ▁on ▁the ▁card ▁alongside ▁the ▁R G ▁number , ▁if ▁desired . ▁ ▁App earance ▁There ▁is ▁a ▁national ▁standard ▁form ▁of ▁the ▁card , ▁but ▁each ▁issu ing ▁feder ative