OxidantZero

Can't you just accept the immediate cash payment, but make sure that it's recorded correctly in your accounts.

I don't know where you live, but the tax law I'm familiar with doesn't care if the customer received a bill in the post or even if they recieved a bill at all. The critical thing is that all payments received within the tax period are declared.

You could still produce a copy of the bill for your records and even a receipt for the payment if it makes you feel better.

The First Testament in the Christian Bible (the entire first half) is the Torah, or Jewish Bible.

I'll add another vote for Podcast Addict.