This article explains when vouchers will be received what to do when a Post Office voucher is processing.
Most vouchers are received very quickly after selecting the retailer but please allow up to an hour to receive the voucher.
Please note for Post Office Vouchers: Once the recipient makes their voucher selection, their voucher can take up to 72hours to process and do not process on Saturdays or Sundays. For more information on Post Office vouchers please visit their website here.