Doing so may end up damaging or invalidating your passport altogether. "The Department could potentially consider novelty stamps as 'damage' to the U.S. passport," a U.S. State Department official ...
Get a new passport In the US, you need to update your passport photo ... Whatever colour they are, whatever stamps they have, they all tell a story.
As a general rule, it is not permissible for the holder to write in a passport other than to provide a required signature and ...