Pardon My Past (1945)

Synopsis
A case of mistaken identity leads to hilarity in this comedy. Eddie (Fred MacMurray) and Chuck (William Demarest) are a pair of GIs who've just been sprung from the service and plan to open a mink ranch in Wisconsin. No sooner do they arrive in the Cheese State than one Jim Arnold (Akim Tamiroff) mistakes Eddie for Francis Pemberton, a footloose playboy who owes Jim a very large gambling debt. Hard as he tries, Eddie can't convince Jim that he isn't Pemberton -- and Jim's strong-arm men demand that Eddie pay up. Eddie goes to Pemberton's estate in hopes of clearing up the confusion, but he learns that the gambler has apparently fled to Mexico. Eddie meets Joan (Marguerite Chapman), a poor but pretty relative of the Pembertons who strikes his fancy, but several other members of the family also think that Eddie and Francis are the same person -- and they're none too fond of their absent relation. ~ Mark Deming, All Movie Guide