Some US-born children of those with recognized diplomatic or foreign sovereign power immunity status in the US at the time of their birth are finding out, even after acquiring ordinary US passports for US citizens by way of a US state-issued birth certificate or other local document that they really are not natural-born US citizens. I was under the impression, perhaps mistaken, that this would mean the US-born King of Thailand was not a natural-born US citizen because of this convention.
Originally Posted by
mvoight
It should also be noted, while carrying a passport is not a requirement while on US soil, green card holders are required to carry their green card while in the US.
They are required to be in possession of the permanent residency card, but that doesn't necessarily mean they have to carry their card on person at all times when in the US. Most such persons even are granted re-admission as LPRs at US ports of entry when showing up without it and there are routines to allow for that which are relatively simple.
By the way, US LPRs with lost permanent residency cards can and do get naturalized without material penalty for lost/stolen/missing cards even when naturalizing to become a US citizen inside the territorial US.