No as a green card holder already its mandatory to always have your green card handy.In case you have lost it you can get a replacement using the Form I-90. In case the green card was stolen you need to attach a police report along while filing the form for replacement of green card.
yes they can do that
The fact that you hold a US "green card" is essentially irrelevant. What matters is the relationship whatever country you are a citizen of has with Spain. US Citizens, with a US passport, can enter Spain for up to 90 days without a visa. You should check with your country's embassy or consulate to determine whether you can legally enter Spain without a visa.
Doesn't matter if you have a green card. It depends on your nationality.
No
No - you need a passport too.
puerto ricans do not have to have a green card to enter or work all they need is a passport and they will be fine puerto ricans do not have to have a green card to enter or work all they need is a passport and they will be fine
No, it is not mandatory for green card holders to posses a machine readable passport (as the green card is machine readable).
No they cannot. You must be a US citizen to enter.
That is allowable.
Any country than an American citizen can go to, but only from the US(show the Green Card and passport in destination country) and back to the US or your home country. Just don't forget your passport and a Green Card anywhere!
It depends on how you are applying for green card. The US green card can be applied through family member, employment or marriage. A family member who is already a green card holder can petition for alien relative using the Form I-130 and once the priority date becomes current the alien can get the visa and enter US as green card holder. Next is through employer who has to petition and green card can be got either with or without labor certification. Lastly after an alien marries a US citizen or green card holder and is petitioned with Form I-130, the alien can adjust status to permanent resident after two years of successful marriage using Form I-485.
With a Green Card, a holder can enter any country a US citizen does not need a visa, without a visa. You must however, find out the maximum duration one is allowed to stay in the foreign country with each visit.