A coupon is valid as long as you do not enter the code on one of the fake verification sites created by spies.
If a stranger has asked you for coupons, there is a 99.9% chance it's a scam.
To use your coupon, you will need to buy a transcash card (for example, at a tobacco shop) and load the purchased coupon onto your card. There are no other solutions.
Above all, do NOT check on a dedicated site (Scam).. Recharge YOUR Card or that of a Friend, if the available amount increases it's that the Coupon was correct..
If a stranger has asked you for coupons, there is a 99.9% chance it's a scam.
To use your coupon, you will need to buy a transcash card (for example, at a tobacco shop) and load the purchased coupon onto your card. There are no other solutions.