You should check to make sure that all the following information is correct before mailing any invitations. If you're not 100 percent sure on any point, don't hesitate to ask someone who is in the know, or even ask the person in question.
Spelling of names
Titles (doctors, military personnel, etc.)
Names of significant others
Phone numbers (just in case you need to call a late RSVPer, or if any of your friends or family want to contact guests to invite them to showers or other parties in your daughter's honor)