Legal Melon
The basis of your lawful immigration status in the United States is described by your current immigration status, which is normally recognized by a visa type.
Current immigration status can be found on various documents.
If you have never changed the immigariton status since arriving, you can find the current immigration status on I-94.
If you have never changed the immigariton status since arriving, you can find the current immigration status on visa.
If you have changed your status since arriving, your current immigration status is on I-797A.