The letter, signed by business and trade select committee chair Liam Byrne and six colleagues, argues that crypto donations undermine transparency, traceability and enforcement in political finance, according to The Guardian and The Observer.
"Crypto can obscure the true source of funds, enable thousands of micro donations below disclosure thresholds, and expose UK politics to foreign interference," Byrne said in a statement to The Guardian. "The Electoral Commission has warned that current technology makes these risks exceptionally hard to manage."