The rule of thumb is booking a corporate code you're not entitled carries a risk. Best case no id required & you get it. Worst case id required & you're stuck w/ rack rate, so sometimes folk have back-up reservations somewhere. The big rule of thumb is not to book the gov't rate if you're not entitled to it, as that usually does get asked for id.

Some individual hotels and/or chains will request id; others don't bother. Supposedly Marriott's going to start id'ing folk (or are supposed to; whether that actually happens w/ front desk clerks after a while remains to be seen).

Rambuster, if I were you, I'd send in the folios for your 2 stays where you get stay & not point credit & say the point credit didn't post so could HHonors please correct it. I've never heard of points not being assigned when corporate codes are used.

Also, if the price differential isn't all that great (ie, only 10Euros), I'd say going w/ reg rates makes the most sense. If it's a huge difference, then the corp rate could be better. YVMV.

Cheers.