If during 1 round my opponent doesn't respect the 15 minutes between moves and he/she doesn't communicate with me to arrange a break and restart at a later time, then it could force me to recheck the game much later (before the 24h recent limit anyway).
In this case the limit of 4 days could be reached very easily.
To not incur in the "post or you're toast" clause, what is an acceptable time before the due date to post the results?
Please consider that it's not always safe to wait the last minute to post a result and that if we haven't even finished the first game in the first 2 days and a half, then the last 24 hours (for example) will not be enough to finish the next 2 games.
So please provide a solution for this case, if possible in the official rules so that the other players will be willing to respect the courtesy rules that you already provided.