The New York State Department of Financial Services asked several banks for information about their relationships with Jared Kushner and his finances, people familiar with the information requests said.

The department, which regulates New York banks and some international banks that do business in the state, sent inquiries last week to firms that include Deutsche Bank AG and Signature Bank , these people said. Mr. Kushner is President Donald Trump’s son-in-law and a senior adviser to the president.

The inquiries, which are expansive and comprehensive, seek information about Mr. Kushner’s individual finances and those related to his family’s real-estate company, Kushner Cos., these people said. The inquiries ask for information from banks about their relationships with Mr. Kushner, including his bank accounts and loans, they said.

A Deutsche Bank spokeswoman declined to comment, as did a spokesman for the state regulator. A lawyer for Mr. Kushner didn’t respond to requests for comment.

A spokeswoman for Kushner Cos., Christine Taylor, said, “We have not received a copy of any letter from the New York State Department of Financial Services.”