Sincerity should be the keyword with any wishes for wedding day. When it is time for you to pass along wedding wishes & wedding congratulations to the happy couple, you want them to feel the affection and bond that brought them to invite you to their wedding day and you to accept the invitation. Wedding wishes can be informal or formal, but should touch upon your desire to share your affection and memories of the couple. So many people simply don't know how to express those feelings, and so choose to recycle tired old sayings instead.