A lady at my church was a Delta Gamma when she was in school, and said that if there was a DG where I'm going (there isn't) she would have sponsored me. What does that even mean?
And since you are "learning" about being Greek, once you are initiated, you are always a member. So unless the lady from church resigned her membership, in which case she could not write a sponsor form for you, she is still a Delta Gamma....not was. If she was one in school, she is one now.