DEAR MISS MANNERS: I received a gift from a family, and the attached card listed all the family members, including a child lost in infancy. I have also received gifts from widows signed "Mr. and Mrs."
I imagine this comforts the gift givers, but how does one address the thank-you note?
GENTLE READER: It is unseemly to sign correspondence on behalf of deceased relatives, but it is also unseemly to pick fights with the bereaved. Address your response to whoever wrote the letter, and make it so touching and considerate that nobody notices how it was addressed.