I think I've seen that blind people in the US have a little machine that they can use to add the braille themselves. Also from a quick google search there's also electronic bill readers that can be provided to blind people for free if they qualify.

In Canada the bills are embossed with braille by the mint. There may be other accommodations too, but I haven't looked it up.

> I think I've seen that blind people in the US have a little machine that they can use to add the braille themselves.

That solves half the problem, but you still don't know whether you're getting correct change.

Not braille; see https://news.ycombinator.com/item?id=45904000.