No conference/convention stays here, all simple bookings via marriott.com and LNF (of course!). Rewards number clearly printed on invoice. Mostly European hotels.

We attend a meeting every November at the Chicago Renaissance and usually have to submit a missing stay request form.

Points Posting - RI
 

Been at the Residence Inn, Amherst for the last eight months. Points have posted without a call maybe twice. They never have a good explanation as to why they don't post automatically

Marriott needs to take a page from Hyatt on this kind of issue. Hyatt Gold Passport instituted a rule relatively recently that if you have to call the Gold Passport program to get the Diamond arrival amenity points posted because they didn't post with the rest of the points for the stay, the hotel owes you an extra 50% (so 1,500 points instead of 1,000, or 750 points instead of 500). That seems to me a reasonable way to go -- sufficient incentive to make the hotel properties clean up their act on the whole, but not so much incentive that guests will try hard to game the system.

Similarly, if MR instituted a policy where hotels that don't post the stay and night credits and points for a stay within 14 days, where the guest had the MR number in their folio prior to check-out, the hotel owes an extra 50%, I think most of those hotels who mysteriously have problems would just as mysteriously stop having problems.

BIG +1
From your mouth to Bill Marriott's ears, oh please, MAKE IT SO! ^ :D