Ha! Fine, it will have to wait until I'm next near a post office with time to kill, otherwise it's not convenient. I think you'll allow that "not an unreasonable amount of effort" could imply "convenient".

I think the post offices where I am only sell the envelopes in bulk, and buying a pack will probably add an unreasonable 20% - 30% of the amount, but I'll concede that most people will probably have an envelope from a bank and a glue-stick lying around.

This is very off-topic, but sending something to an address which I can't tell is complete, without a name, has reminded me of something I find interesting.

A few years ago, my mother received a postcard from a friend who didn't have her address handy. She sent it with just my mother's name (first and last), the city, and country (New Zealand). It took some time, but it reached her! In NZ, "city" is used for some pretty small places - the population is only around 70,000. But I'm still very impressed with the effort to deliver that to her. Especially for a postcard - even internationally the postage on those is not a lot!

Hmm - I've just seen that postage is $1.55, so >15% of the amount. I'm not sure that is a reasonable fee. I'm deducting $2 from what I'm sending! Lucky there are $2 notes here.

Of course, if not stated I suppose it would be reasonable to assume international bets are are in USD, but it's close enough, and this feels like it's only just holding up anyway.

And most importantly, I think sending $8 is funnier than sending $10.