> For added fun, many organizations, including banks and the US Government/various federal pension boards, refuse to recognize a power of attorney letter, either.

Ouch! That's got to make things hard!

That's thankfully not a problem where I live. Here the problem is more that the banks might be a little over-eager to take agency away from seniors, since once they get a whiff of their grandson helping them with their banking and what not, they lock their account and claim to have broken their TOS or the law regarding not having other people control their account, and that if you want people to do that, you need that power of attorney.

Honestly, this is a lot better than the alternative of not being vigilant enough, and I'd honestly argue that it's better to let there be as little shame as possible in handing over your banking to your next of kind, so that when it starts getting really bad, it's not too late. But this obviously gets very individual very quickly. One senior will handle their banking just fine until their 105, while the next gets Alzheimer at 55, while the next starts to have to put a lot more effort into doing it right at 75, but they don't have any next of kin they can trust to not slowly empty their savings account once they get the power of attorney.