I can handle that one first, and Blair can jump in.
For us, we reviewed our client base against the list that we received. I'd have to double-check this, but I don't believe that there was anyone in our client list who actually matched. We obviously blocked some transfers from the list of the client addresses that were given by the RCMP, but that was the extent of it.
The biggest concern was the uncertainty in the first couple of days of exactly what we were expected to do.