@Sobirvs i'm not rude here.. As paarkhi mentioned there are people waiting for invites. So asked you to give chance for them as well. Why i tagged you here's, you been collecting it and claiming it in your account and expecting others to use your account or COD. But not lot of people comfortable in using their CC in others account or nor they wanted COD.
I felt strange because just yday you had invites in your account and you should have given that to your sister. I'm not sure whether it got wasted already
Are you claiming in your account, just because you will get more invites later?

:kidding:
Again as paarkhi mentioned, it's up to the donor and you. Hope your sister gets the opo now