I have a T1 client who would like to switch back to snail mail from CRA. Can I do that through Represent a Client?
You definitely can’t. I don’t think that the client can do this through My Account either.
I think that the client has to call and say that they no longer want the notices electronically. Perhaps state that they know that they will be moving into an assisted care facility within the next year. They want to ensure that the children can access the paper notices when they can no longer take care of their affairs.
There are other “stories” that could be used, but try to go with the least alarming. For instance, don’t go saying that their email has been hacked. That is a good way to lock the account down for everyone.