Sr., Jr. etc. after a name are suffixes, not part of the legal name unless it was on their birth certificate or they legally changed their name to include it. You are verifying his name, not his status of Sr. or Jr. Same way Dr. is not part of your name, but I'm sure you've seen the prefix Dr. on documents before.
Someone with a birth cert that says John Smith Jr. will not become John Smith Sr. because Jr. is a legal part of his name, he will always be Jr. While John Smith can become a Sr. when his son John Smith is born, and his son John Smith can be the III when he is born. Designations (the suffuxes only change) when they are not part of the legal name. |