whoever has this, means it's been stolen!

"I heart immigration"

"Warren Peas"

"Veni, Vidi, Vici"

"Sanitized for your protection" - but that would cost extra.

With only 15 characters, my nomination is:

"LoJack equipped"

--Woody

I hate to wisecrack on this, but I think Rex' suggestion of

"Viaggio, ergo sum"

is a bit of a language chaos.

If you want it to be Latin, it would have to be

"Migro, ergo sum" - or possibly "Navigo, ergo sum".
"Iter facio, ergo sum" would be more than 15 characters.

Those Romans did not really travel for pleasure, I suppose, therefore the different possibilities.

How about "Let me in!"? as an alternative?

Yes, I knew (er... suspected) that it was not correct Latin - - but more likely to be understood by fellow travelers my way, I submit.

Ever seen "Pulp Fiction"? There's an interesting embossed sentiment on his wallet.

Ah, just do "WorkToWander" !

If you really want to make it a worthless passport under 15 letters, you can emboss:

Osama Bin Laden

No one is getting on a plane with that name.

But I really wouldn't want such bad karma on my passport. I'd probably put something simple like:

"Passages" or "Journeys"

to reflect both my literal adventures and the figurative things I've learned from them.

How about "I cannot rest from travel: I will drink life to lees...
Tennyson

we're supposed to cover our passports..??!!