[quote name='m3hl']well i can show you a picture of it before i pulled the back off... someone was going to buy it from me, so i sent the code.
he told me it didnt work and was understanding. after we both researched we found out that the card was probably for xbox in mexico (english/spanish instructions and the fact it was 4500 m$ and not 4000).
so the answer is... i would let the person test the code first before sending me anything and hopefully they are honest like me.[/quote]
^^^Kind of a bad move if you're doing that. Who's to say that person isnt asking the same thing you are, then making a mexican account to use them? I mean if you hinted at it being mexican to him/her like you did here, then it's reasonable to assume they already figured out to make a mexican account and use the points after enough digging around. Which leaves you high and dry on all ends of the matter, cause you could've done the same thing, and now you may not even be able to trade the points to anyone without possibly being labeled a scammer in the end of a trade or sale of the points, cause they would be used. It's not even a tradeable item in a sense either if you're gonna let them try the code freely. They could do the same thing I just mentioned and not give you anything in exchange. Not everyone is honest when they know they got a golden chance at getting a freebie.
Like everyone suggested just make a mexican account, and use the points if they arent already used by this time. Then download w/e you want and access that content through your primary XBL account.