"Mazars has indicated that they will temporarily pause their work with all of their crypto clients globally, which include Crypto.com, KuCoin, and Binance. Unfortunately, this means that we will not be able to work with Mazars for the moment," a Binance spokesperson said to Coindesk.
Mazars had performed a so-called proof-of-reserves check on Binance's bitcoin holdings earlier this month, finding its bitcoin reserves on a single day in late November were overcollateralized.
The audit firm has deleted the webpage containing a report on the check, published on Dec. 7.
Mazars and Binance did not immediately respond to requests for comment.
The pause by Mazars comes amid intense scrutiny, sparked by the bankruptcy of the FTX exchange, of how such platforms hold user funds.
Binance was this week hit by a surge in outflows, which Binance CEO Changpeng Zhao called "business as usual." Binance also paused withdrawals of a major stablecoin for a period on Monday, blaming delays in the traditional banking system.
(Reporting by Mehnaz Yasmin in Bengaluru and Tom Wilson in London; Editing by Nivedita Bhattacharjee)
