Originally Posted by Rambuster

OK, here goes:

I tried out the corporate codes for IBM (001368083) and HP (009122532) recently at a Hilton in Germany.

The stay finally posted and will count towards my Diamond renewal in terms of stay and nights posting, however no points were awarded - not even for incidentals !

The stays post as COR97 and COR47 in the Plan Code section.

I am kicking myself as the HP rate on one occasion was only €10 cheaper than the regular rate. But serves me right for booking something whithout knowing the details ...