In Store: Visit the Merchant's store/outlet/venue. At the time of paying the bill advise the Merchant you are a member of GAIN. Open Merchant offer in the GAIN App and enter the bill amount. Merchant enters their unique PIN Number to generate a voucher and apply the benefit to your final invoice.Order Online Pay on Delivery: Visit the Merchant’s website or App. Build your cart and at checkout, choose Payment on Delivery. When Merchant representative’s arrive, open the offer on GAIN App, enter the amount and Merchant will enter the PIN Number to activate the voucher and apply the benefit to your final bill.RemotelyContact the Merchant to agree your requirements and cost. You will need to go to the GAIN offer page, enter the total bill amount with VAT and the Merchant will provide you their GAIN unique PIN Number via email or on the phone to avail your GAIN offer.