I don't think a check bit is required because verification can be down with one or more of other fields in a shareholders record. Also, the account number can be assumed to be, I think, internal to Computershare so error checking doesn't make sense if it's not being communicated to the outside world. Also, the CS rep was asked(in that fateful post) if Computershare numbers are in ascending order and she said no. No to Computershare numbers. The context was Computershare accounts as a whole. She did not say account numbers are non-ascending to GME shares specifically. Or to any specific company for that matter. I think the account numbers could be sequential but don't appear that way because of the time it takes for different apes to DRS and get their results back. And the differing lengths of time it takes apes all over the world to report them. The CS rep's answer was taken out of context. This makes more sense than this stupid MOD11 B.S. No offense, but I"m really tired of that.