Check max amount valid for the USA.
My exchanges to the Caribbean went through without a hitch. When it comes to the USA !!! beware !!! The recipient went to 4 different WU offices who refused rudely to produce USD1000, saying the maximum was USD200. No explanation. It took several long calls to their support section, and the agent here to refund me in total. The agent wanted to hang on to his fee £44, for doing nothing. He was not aware they would refuse anything over USDS200, and was dragging his feet, although he was ordered by WU to cough up... eventually.