Dear Abby is written by Abigail Van Buren, also known as Jeanne Phillips, and was founded by her mother, Pauline Phillips. Contact Dear Abby at www.DearAbby.com or P.O. Box 69440, Los Angeles, CA 90069.

DEAR UNTHANKED: If I felt close to the daughter, I would attend the wedding. I would give her a gift, recognizing that it probably would not be acknowledged because the girls were never taught the social graces. But I wouldn’t preemptively penalize daughter No. 3 for the sin of omission committed by her sisters.

A few years ago, my cousin's daughter wasa married. We traveled, attended and left a generous gift. But we never got a "thank you." Same for her younger sister's wedding. Now the third daughter is getting married.

A few years ago, we were invited to the wedding of my cousin’s eldest daughter. Although my cousin and I are close, I barely know the daughter. We were invited only because my cousin wanted me there.

Dear Abby advices a person who believes that she should have received a “thank you” card from her cousin’s daughter’s wedding.