There have been reports of someone claiming to be from U.S. Citizenship and Immigration Services (USCIS) calling students/scholars saying that the students/scholars status is in jeopardy if they do not pay a fee. USCIS will never call and ask for money for training, products, or forms. Do not provide your personal details, such as SSN/ITIN, bank details, or credit card details.

More information can be found on the following websites:
Avoiding USCIS Scams
Common Immigration Scams
Beware of Immigration Scams (Brochure)