I found out today that the post office won't insure documents beyond $25k. However, they will happily charge you for any declared value beyond that. If you declare something at $100k, that works out to ~$94 in postage. On the other hand, if you declare it at $25k, it's only $31.

For $94, it had better be delivered in a briefcase chained to the postal worker's arm. But that's definitely not the case -- the service/insurance level is the same either way. This makes no sense.

Then again, it's the post office, so it's not supposed to make sense. And, yes, I did the sensible thing and only declared it at $25k.