1) you travel a lot and sometimes may need to mail your passport off to get a pre-travel visa from some consulate, while you are still outside the USA. This way you can send off one passport to get the visa for your next country, while keeping a valid passport with you while you’re abroad.
2) You need to travel between Israel and countries which have laws against visiting Israel (Historically, GCC countries). This way you can always present whichever passport doesn’t have Israel’s entry and exit stamps on it.
I’ve had two valid US passports at the same time, and I’m just a random nobody American.
https://www.touristisrael.com/the-israeli-passport-stamp/974...
It used to depend on where you were coming from. When travelling to Israel for work a few years back, my passport (irish citizen) was not stamped, but my colleague's (at the time, a Turkish citizen) was.
No idea why.
And to show how stupid things were--he also had a stamp he had made up to make forged entries on our yellow books. At that time your average joe certainly did not have an up-to-date smallpox shot--but at multiple border crossings they would hit you up for a bribe if you didn't have an up-to-date smallpox shot. Hence fake them. (Even around 2000 which was the last time I had occasion to have anything added to my yellow book there still was no anti-counterfeit protection.)
Part of this is simply because American passports are extremely valuable. Another part is that anyone who wants to fuck with you in some semi-official capacity now has to choose whether to go back to your hotel or arrest you on the spot, which puts them in a better mind to give up or take a bribe.
Happened to me at an airport in Thailand. Some airside police officer demanded to inspect my passport, then wouldn't give it back to me until I walked him to an ATM so I could pay him a "tax" in cash.
I never went back to Thailand.
It most certainly can be done--I wore mine basically 24/7 for a year. The only time it wasn't under my clothing was for border crossing or bathing--and in the latter case it almost always was under a traveling companion's clothing. No close calls--but someone else in the group wasn't so cautious and hers was snatched. Fortunately, the thief wasn't sophisticated, kept the cash and dumped everything else quickly.
In the end you'll have two passports but one of them is now useless and it will be flagged the moment you actually use it for traveling. It may not be pleasant when you're abroad and the authorities catch you using an invalid travel document.
I guess it makes more sense if you never intend to use the old passport again for crossing borders?
[1] https://www.interpol.int/en/How-we-work/Databases/SLTD-datab...
I think it may be illegal, but I've heard from people who travel to places where it's sketchy for Americans to travel, that they report their passport as destroyed, get a second copy issued, then keep the first one.
The reasoning is that certain immigration departments see red flags if they see visa stamps from certain other countries, and you may get grief for having visited them. Cuba and the US used to be one, but cross-border rivalries are another. Knowing who hates who and presenting the right passport to receive the stamp would save you grief. Also if you encounter corruption/extortion you can schedule the next flight out and run.
With the electronic ones now I don't know how many places that still works.