How do you apply a Runescape Game Card?

[Mitchell_]

Well, I just did a trade and I had to get the MM to apply the card for me. After the trade, I asked him how he did it, because I need to know for when I start MMing, so if someone could explain it to me, that'd be great. I have to option on the subscription page for Runescape Game Cards specifically.

 

[Fatih]

Add my msn and I'll explain.

You need to change the country if the option isn't there.