Foreign nationals, including green card holders, should always carry identification and proof of permission to be in the US. The following documents should be carried on your person or should be easily accessible:
- Green card – for permanent residents
- I-94, Record of Admission for nonimmigrant or temporary visa holders
- Approval Notices for immigration applications
It would be wise to make extra copies of the above documents and keep them in a safe place.
Most immigration forms require the applicant to pay a filing fee. Applications that contain an incorrect filing fee are rejected.
Maintain a valid, unexpired passport at all times when you are in the US. In most cases, you may renew your passport at the embassy of your home country located within the US.