Who sends the save the dates?

This question comes up now and then, along with: "On save the dates, what should the return address be".

It's not a cut and dry answer.  Ideally, the return address on the save the dates should be the same as they will be on the later formal invitations.  And... ideally... that would be the address of the person/family that is hosting the wedding.  Who is hosting the wedding?  The person who is paying for it!

The bride and groom (or couple) might be mostly paying for the wedding, or one of the parents might be.

When the parents are paying for everything, use their address.  This is also why you sometimes see wording like "Mr. Person and Mrs. Person invite you to the wedding of their daughter Bride to Groom...".  Because the parents are hosting the wedding, they are included prominently in the wedding invitation wording.

Sometimes, however, who is paying for what isn't even decided yet when you send out save the dates.

That's why there isn't an easy answer to this question!

If the bride and groom are already living together, that is an easy choice for the return address.  Even if someone else is paying for the save the dates- whoever is actually mailing the save the dates is the one that should have their return address on there, so that they can handle any that are returned for having the wrong address.