The Z Reserve was special. It was formed after the Armistice in case fighting started again. It was disbanded once it was clear there would be no more fighting. Men did not join for a set period like other reserves.
The discharge certified had two uses. It was to help a discharged man find work, and to claim any benefits there might be. In both cases they would need to show he was serving again. He would have received a new one when he left the RAF.
Ken
