Invitations are always sent to both members of a couple, even if the bride knows only one of them
or if only one of them is expected to attend. Here are some common examples:
Married couple
Mr. and Mrs. John Taylor
Married couple where the woman has kept her name
Mrs. Amy Lever and Mr. John Taylor
Widow
Mrs. Amy Taylor
Divorced woman who keeps her maiden name
Miss (or Ms.) Amy Lever
Divorced woman who uses her married name
Mrs. Amy Taylor
Husband is a doctor
Dr. and Mrs. John Taylor
Wife is a doctor
Dr. Amy Taylor and Mr. John Taylor
Unmarried couple living together or gay couple (on 2 lines)