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To apply for an H or L visa, you must have the following:
A petition approved by the U.S. Department of Homeland Security (DHS) in the
United States.
An approved original I-797 and a certified copy of your I-129.
If you adjusted status within the United States, you must bring the original
I-797 to your interview.
You may also need a certified copy of the I-129 application material.
If you are a returning H1B, you should also bring a letter from your
employer confirming your continuin