Banks don't have to cash a cheque if it's too old, which is usually six months after the date it's issued. Although his bank suggested it was probably a one-off, at least one other wedding guest told Michaels their cheque was also deposited twice. WATCH | A look at why cheques can be deposited twice:Début du widget Widget. Fin du widget Widget. The issue is the fraud levels are small and fixing it is expensive, so the banks don't care, said Wisniewski, a research scientist at the cybersecurity company Sophos.
