Two recent circuit commercial court decisions have considered the scope of a Payment Service Provider’s duty of care to its customer when executing payment instructions (Quincecare duty) in the contexts of identity fraud: Hamblin v World First Limited [2020] EWHC 2383 (Comm) and authorised push payment fraud: Philipp v Barclays Bank UK Plc [2021] EWHC 10 (Comm). This article speculates in the light of these two decisions whether, where scheme funds lent under the Coronavirus Bounce Back Loan Scheme have been misapplied, the British Business Bank could escape liability under the Scheme guarantee on the grounds that the lender has breached its Quincecare duty.