No big deal,
Go to the post office and cash it............... That is why I like the US postal money orders. Your post office will cash it if they have the cash on hand. Sometimes I have to come back so they can get more stamp money saved up, but that is the method of cashing a U.S. or Canadian postal money order. Truth in advertising, no wait to clear, no BS, clears right on the spot, Canadian or US Postal are treated the same.
Bruce