"The trap" was possibly this different thing: "A seventh postmaster, Alan Bates, refused to sign his weekly accounts, saying it would have made him liable for

"The trap" was possibly this different thing: "A seventh postmaster, Alan Bates, refused to sign his weekly accounts, saying it would have made him liable for any losses." https://www.computerweekly.com/news/2240089230/Bankruptcy-prosecution-and-disrupted-livelihoods-Postmasters-tell-their-story https://www.computerweekly.com/news/2240089230/Bankruptcy-pr... IM