Liz Truss is facing questions over Foreign Office spending, including £1,841 at Norwich City's online shop during her time as foreign secretary.
Labour's shadow attorney general Emily Thornberry queried the use of Foreign Office expense cards, up 45% on last year, in a letter to the department.
She asked why officials had incurred a number of costs, including two payments to the then Premier League club.
The Foreign Office has been approached for comment.
The payments were made on two dates: £1,318 on 21 October and £523.50 on 21 March.
At the time, South West Norfolk MP Liz Truss was leading the department as foreign secretary.