72-hour rule/10-day rule?

[David Merrill]

Good point. Suitors with LoR evidence repositories quickly learn that when you do all you can about a nuisance presentment, you fall to sleep a lot quicker. So if you have an hour before the post office closes, get it done.

[Moxie]

Suppose the R4C is not sent in a "timely" fashion. What will happen? What's the worst that can happen?

[JohnnyCash]

Default. That's the worst that can happen. If it's from the bank, then you might enter default, and that might lead to foreclosure, and you'd lose having a free place to live.