Former Health and Human Services (HHS) Secretary Tom Price wrote a personal check to the U.S. Treasury Department for the expense of his travel on private charter planes before resigning, an HHS official confirmed to The Hill on Thursday.

Price wrote a check for $51,887 before stepping down last week, and the “necessary processing of that payment by HHS has been completed,” the official said. 

Price resigned following a string of Politico reports that showed his use of private and government planes cost more than $1 million since May. 

The $51,887 appears to cover the cost of his seat on the planes but not those of his staffers. 

Price is now being investigated by HHS’s inspector general and the House Oversight and Government Reform Committee.

Top Democrats have demanded to know whether Price followed through on his promise to write a check before resigning. 

“While Price may no longer be Secretary of HHS, he still has the responsibility to follow through on his commitment to repay the American public,” Sen. Patty Murray (D-Wash.) wrote in a letter to Treasury Secretary Steven Mnuchin this week.

“Anything less is a clear indication that Price was not, in fact, sorry for his abuse of taxpayer dollars, but was just sorry that he was caught.”

Murray also criticized Price for only offering to pay back a portion of the costs.