Old postage stamps became invalid on Tuesday, with anyone using them now facing a £1.10 surcharge - meaning new stamps with barcodes are now the only ones allowed.
Royal Mail 100-day warning as thousands of stamps will become unusable walesonline.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from walesonline.co.uk Daily Mail and Mail on Sunday newspapers.
Existing Royal Mail everyday stamps will be unusable after barcode roll out hulldailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from hulldailymail.co.uk Daily Mail and Mail on Sunday newspapers.