Invitation Etiquette

Unless it's a very formal invite, using only the guests' first names should be fine!

I did this. And used "Aunty", "Uncle" etc where appropriate (depending on what I usually call the person). My parents' invitation was made out to "Mum and Dad"!

Bizarrely, considering how informal the rest of our wedding will be, we used first and surnames, unless there were lots of people to include, ie a couple of families of five didn't get surnames just because they didn't fit on the page! I would say use whichever you're happiest with, unless the rest of the invitation is super formal. No one will really notice.

I just used their first names, and even on the envelopes to some couples I just wrote their names although married couples I did Mr & Mrs xxxxx