How to know if an I-94 is fake?

Question

how to know if it is fake just by simply looking at it? does it have any distinguishing/hidden mark/s to make it authentic?

Answer 1

Use the 1-94 and when the entrant is not accepted it is fake.

Answer 2

why do you need to know? considering that the information on the I-94 card is data entered into the DHS data systems and can easily be verified by CBP at the port of entry, including a photo and fingerprints, I wouldn't recommend using it if you have any reason to believe it's fake. Of course, if it's really yours, you shouldn't have any reason to ask this question.