[kalleboo]

Here in Japan it’s a common setup to have a box you leave an unlocked lock on that the delivery person locks and you have the spare key for https://item.rakuten.co.jp/yasuize/zk-tb-0533-01/?iasid=07_1...

[irrational]

What happens if there are more than 1 delivery in the day? Or if those darn kids down the street close the lock before the delivery person gets there?

[gambiting]

Well, then tough luck. It doesn't have a solution for that. I had one of these boxes and this was never a problem though.