DEAR MISS MANNERS: I grew up in an era when it was customary to enclose a personal check in a greeting card as a gift. This worked for celebrations attended in person, and also when the card was mailed. Personal checks are being used less and less. I personally write maybe two or three per month. My adult daughter just attended the wedding of a college classmate, and where we live, the vast majority of wedding gifts are envelopes containing cash or checks.