There are many reasons Canadians may have an uncashed cheque from the Canada Revenue Agency (CRA). For example, someone may have moved and not updated their address, or the cheque may have been lost, stolen, or destroyed.
Individuals and their legal representatives can now view their uncashed cheques in My Account and, if necessary, ask for a duplicate payment.
CRA cheques never expire or become stale-dated. You can cash your CRA cheque for free at any financial institution in Canada.
(Full information: www.canada.ca/en/revenue-agency/services/uncashed-cheque.html)