If they will be joining visa run agencies then just show up at the meeting place on time, ride the van for 3-4 hrs. Unload the van when everyone does so, go along with the crowd and go wherever everyone is going. Once the guide ask for their passport, give it to him and pay the fee. Wait for 30-1hrs for the passport, get back, follow the people they are with. Ride the van again to go back to Bangkok
So apparently same documents are needed for cancellation of Non O. However the termination letter must state that, the company wants to terminate the Non O of my wife under my Non B.