He was consulted before anyone else by Reginald Bray about the projected invasion of Henry Tudor, Earl of Richmond, planned with Henry Stafford, 2nd Duke of Buckingham. On the failure of Buckingham's rebellion he with others fled to Richmond in Brittany, and he was consequently attainted in Richard's parliament. The custody of Petherton Park was granted to Richard FitzHugh, 6th Baron FitzHugh and Daubeney's lands in Somerset, Lincolnshire and Cornwall were confiscated.