Originally Posted by
littlevoices
Actually the surcharge is only for airline programs (and US based programs at that), they don't charge if for Marriott points - or at least I've never paid it.
That has been my experience, which is why I almost always credit Marriott instead of United (or any other airline that I have a FFN) for my rentals.
In checking the receipt for my last rental (Saturday), I can validate that there was no surcharge for crediting to Marriott.