I gave my sister's SS# out to a telemarketer. I believed it was a rep from BOA, asking to join something, ID protection or some reward program. Anyways, been several weeks and still no membership packet. Now I'm worried. What can an identity thief do with a SS#? Does anyone know what number or where I should call to see if any damage has been done? Yes, I was foolish to give out the SS# out in the first place so lecture needed.