Won a $500 lotto ticket 7-11 gave me a money order?

i won $500 on a lotto ticket today and 7-11 gave me a western union money order but didnt put my name on it and i questioned it and she said my bank will explain because they dont give $500 in cash.... ive never gotten a money order it just looks like a official western union money order but without my name on it, so will my bank honor this?