Apex domains cannot have CNAME records.
Question and response
Question
dig orbibankfatura.com.br. NS
Answer
orbibankfatura.com.br. 5 NS skip.ns.cloudflare.com.
orbibankfatura.com.br. 5 NS kim.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
kim.ns.cloudflare.com. 2 A 108.162.192.126
kim.ns.cloudflare.com. 2 A 172.64.32.126
kim.ns.cloudflare.com. 2 A 173.245.58.126
skip.ns.cloudflare.com. 2 A 108.162.193.233
skip.ns.cloudflare.com. 2 A 172.64.33.233
skip.ns.cloudflare.com. 2 A 173.245.59.233
kim.ns.cloudflare.com. 2 AAAA 2606:4700:50:0:0:0:adf5:3a7e
kim.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c07e
kim.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:207e
skip.ns.cloudflare.com. 2 AAAA 2606:4700:58:0:0:0:adf5:3be9
skip.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c1e9
skip.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:21e9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0