Are rehearsal dinner invitations necessary?

You definitely don't need invitations for it. You can just text or tell people in person. I also think that most people assume that if they're needed at the rehearsal then they'll be at a rehearsal dinner.

You don't need invitations for it (though can certainly send invites if you prefer). You could instead just text/email the info to everyone, just so they have it in writing to reference in case they forget the time/place.

A formal invitation isn’t necessary. Just word of mouth at the rehearsal. “We’re heading to ____”

Like others have said above, invitations are not mandatory or necessary for the rehearsal dinner! We're planning on sending a group text message to all that are involved so they can have the details in case they need them!

I sent an evite to everyone just so they had the time and address. We had more than just immediate family and wedding party there though so I think the évites were appreciated (since we invited certain extended family members who probably wouldn’t have thought they would be included)

I put an extra details card in the invitation suite of those that were invited/needed to attend the rehearsal. It had date, time, and location.

A formal invitation isn't required for a rehearsal dinner. I do like the idea of the extra details card in the invitation suite though!

If the majority are tech-savvy, make sure you have everyone’s email & current cell number.