If a passenger rides with you on a saddle sore ride that becomes certified, can the passenger get thier own ride certifacation?
A passenger who completes a ride also becomes an IBA member, with their own IBA member number. As the rules state,
"You may also complete the ride two-up (with one person doing the piloting, the other being a passenger the entire distance - you may not share piloting duties!). In these cases, the Iron Butt Association issues one certificate, with both rider and passenger on it, but we provide two copies of it; one for the rider and one for the passenger. There is NO additional charge for a passenger, however, if they would like a pin or plate frame, you will need to add that in on the fee schedule page."
Ira Agins
Iron Butt Association