A Democratic lawmaker is calling for the House Financial Services Committee to hold a hearing to examine why some banks are requiring customers to prove their citizenship status.

Rep. Emanuel Cleaver, D-Mo., is asking the committee to call officials at the Office of the Comptroller of the Currency and the Financial Crimes Enforcement Network, as well several national banks, to testify on banks’ using the Bank Secrecy Act and the Patriot Act of 2001 as justification for seeking citizenship information.

Specifically, Cleaver said he is looking to find out what quantifiable measures banks put in place to ensure that the citizenship requirement isn’t causing a significant invasion of customers’ privacy.

“I recently became aware of this after hearing reports of people in the area whose bank accounts had been frozen because they did not respond to an inquiry from the bank on their citizenship status,” Cleaver said in a press release. “They are interfering with the livelihood of citizens.”

Read more in American Banker.