Originally Posted by
sdsearch
No. LNFs have to filed at least 24 hours in advance, so you can't possibly get an LNF for a check-in tonight.
Seems like the Marriott site says they can be submitted on the day of arrival:
"To ensure processing of your claim in time for your arrival, claims must be submitted no later than 11:59 p.m. for same-day arrivals on the same day of the claim."