When you first land at a merchants page (after clicking though on the Marriott Mall portal) print out(or save)that opening page since it has all the affiliate transaction Id number.
I have had to provide that info on more than one occassion and it is pretty much needed if you need to elevate the request for missing points.

The customer service for the portal(which is shared amongst a few airlines and Marriott)is based in Phonerepistan and is not pleasant to deal with.

After far too many delays in posting of points for VERY major purchases($17k) and having to chase purchases several times I abandoned this altogether.I refuse to give money to either Marriott Rewards nor the Portal service for such a pooly run system.

I now use ebates or Mr. Rebates.