Matty Gets Hers! TO BE READ ONLY BY PEOPLE WHO HAVE SEEN THE MOVIE (This critique is all spoiler).
This movie could have ended with Ned behind bars waiting for his murder trial followed by the final beach scene with Matty. That it didn't do this has to do with the scenes in between. These scenes are: Ned snaps out of his jailhouse funk and says outloud, "she's alive!" He then [obviously] asks his friend the detective, J.A., who solved the case and arrested him, to come to jail for a visit and tries to convince the cop about his realization. J.A. appears to be unconvinced. Then, some time later, Ned gets a high school yearbook in the mail and finds out whose identity Matty stole and in so doing, he (and we) learn Matty's true identity. He now has a name, use of which, among other things, would be on a passport. So now the final scene of Matty, living her long-dreamed of wish of being wealthy and being in an exotic place, brusque to her gigolo, moodily dreaming of Ned perhaps, has a different meaning. Ned will pass on the valuable information to the bulldog detective J.A. and, spare us, the viewers, of a cumbersome too long story and movie. Finding her, extraditing her, trying her, etc. We get to think about the future; her great surprise when she's busted and, yes, Matty get hers!