you put sincerely, your name
Set up a gift registry and put the details on the invitation.
When having a formal affair then put on the invitation 'formal dress.'
Put the names of the bride and groom as well as the confirmed date of the wedding. Save the date cards proceed the invitation and will not have detailed information as it may not yet be available.
In the birthday invitation card you can put 'no gifts please.'
What you should put on an engagement party invitation really depends on what you like. If you have a theme in mind then that's what you'll put on the invitation. It's really up to you.
Not long ago it was a faux pas to include registry information on the baby shower invitation itself. The convention was to omit gift registry information completely or to only include it on a separate enclosure. If the registry was not provided, the hope was that the guests would ask the hostess and she would provide the information upon request. Today, protocol has given way to practicality and we see more baby shower invitation with registry information than without. So, especially for informal affairs like a baby shower, it is increasingly acceptable to include baby registry information on the invitation.
You should put in both seriousness and a bit of laughter in the invitation. Explain what it will be about and why you want the certain person to attend.
You address the envelope to the person and only put "X, Y and guest" on the invitation.
came one came all.
Write what the invitation is about. Write what you need to bring, who's it for, where, what time, if you need to RSVP, and what date, if there is a theme and other informative information.
* It is better to put on your invitation 'Please, no gifts.' This gives your guests the opportunity to relax and not have to give a gift, but for those that feel it's protocol to give a gift they will do so anyway.