It appears you are asking about the Form I-94 (Arrival/Departure Record) for travel to the United States.
Definition: The I-94 is a critical immigration document (often digital) issued by U.S. Customs and Border Protection (CBP) that serves as your permit of stay.
Purpose: It dictates your authorized status and the specific date by which you must depart the U.S. or file for an extension.
How to Check: You can view your record and travel history on the official CBP I-94 website by entering your passport information, first name, and last name.
Validity: The officer at the port of entry determines the authorized stay duration, which can be up to six months for tourist visas, though this is not guaranteed.
Corrections: If your I-94 has an error, you must contact CBP to have it corrected.
If you are trying to check your I-94, I can guide you on what documents you need, or I can help you find information on how to correct an error on the form. Let me know which you need!