Using other's Adword coupon

Hi guys ( sorry for my English ),
In your opinion, how safe is to use an Adwords coupon that is not mine??
I've received a GAdw0rd$ coupon through a false Gmail account.. there're a lot of money ( 75? = 93 $ !!! ) and I don't want to lose them!! ( also I don't know why they send me that coupon ..)
I could use this coupon on my *real* account but I must be sure that I don't loose my *real* G account!
The alternative is to buy a virtual credit card and use it to start a G.A. campaign with the fake account..
Thank you so much for your reply!

I wouldn't use it if I was you. Give it to me I will test it out and report back.

Money2spare said:

I wouldn't use it if I was you. Give it to me I will test it out and report back.

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If you need help let me know !

you know to click enter