You may send a gift, but it's not obligatory. You're not required to send a gift, but usually you'll want to, unless you don't know the bride or groom well or haven't seen the couple or their families in years. Don't do it. The guideline still stands that it's in poor taste to mention gifts in wedding invitations. Use word of mouth to get the message out about the stores where the couple has registered.
Customs vary among religions, ethnic groups, and localities.
Thank-you notes should be written as soon as possible, within three months after the date of the wedding. The amount spent on a gift should be based on the guest's affection for the couple and their families as well as the guest's financial situation. All rights reserved.