The envelope contains consular's letter, his forms, x-ray, etc. They don't want you to temper with the contents. The plastic GC will be mailed to him 2 to 4 weeks AFTER he enters US inspected by CBP.
The envelope contains consular's letter, his forms, x-ray, etc. They don't want you to temper with the contents. The plastic GC will be mailed to him 2 to 4 weeks AFTER he enters US inspected by CBP.