Contact the US Post Office. If there is a problem with the number, you can probably expect some serious interest on the part of the Post Office.
no it isnt
A US passport is valid in all 25 Schengen countries.
If it's a valid US passport or you are a dual-citizen most likely
Both of them are valid for 10 years from the issue date.
Yes. You always have to have a passport that's valid past the return date when leaving the US, since you can't enter the US without a valid passport.
What is the maximum amount of time a canadian citizens can stay in the US with valid passport?
No. If he is an American he must have a valid American passport.
No, you cannot. Passport must be valid.
You should always have a valid passport if you know you are going to travel outside the US. It does not matter where you wanna go.
no
A valid US passport.
You Don't. You need to have a passport in order to have a passport number.