How to use a facebook coupon?

[Dani]

I received an email saying that I've got a $50 Facebook Coupon and each time I've gone to use it, it wants my Paypal or Credit Card details. I do not want to put them in though.
On my facebook account it says I've redeemed it and that it's on there, so why can't I use it?

[Daniel]

Thats Because The Email That you Got is Fake Do Not Believe in These Emails That you Get That you Received Coupons Gift Cards What Ever it May Be

[Mark]

Sounds like scam to me, as the last time I checked facebook was free!