I'm afraid to try it. I wouldn't have worried with my old passport - it was bent and rolled and broken in like an old shoe. This newer one seems to be made out of a really cheap cardboard product. I suspect it will dissolve if I ever get it wet like I did the old one. I'm afraid if the Goo Gone leaves even the slightest mark, someone eagle-eyed agent will accuse me of tampering with my passport or defacing it.