You can check OPSM gift card balance by first going to the Frequently Asked Questions page. Once there, go to Gift Cards and Gift Options section and click on What is the amount remaining on my gift card? to check your card balance. You can check OPSM gift card balance online on our website, or call OPSM at 0800 733 747. You can also visit any OPSM store and ask a store cashier to complete a balance check enquiry.