Ok...now I need invite help...

Although etiquette says differently, I would put the name!

I agree with cp - from all the books I read,
'& Guest' does not need to be written on the outer envelope especially if they are not living together or married.

Oh jeez...now I'm soooo confused. I don't want anyone to get offended if their name is not on the invitation!!! I guess I'll write his name on it...

So then what do I do...

Miss Jane Doe and Mr. James Jones

don't stress!! I think whatever you do is fine - no one is going to say, you didn't follow the book - who cares!

Thanks everyone

The outer envelope should say:
Ms. Jane Doe
123 First Street
Anywhere, New York 12345

Inner envelope should read:
Jane and Joe

At least from what I've read...

I agree with cp.

Ok, but now this all brings me to this next question...people who are being invited with guests...and they don't have steady girlfriends or boyfriends...on the outer envelope do I write...

Miss Jane Doe and Guest

or do I only write Guest on the inner envelope???

Again, the books say '& Guest' on inner envelope only or you can include their name if you know who the guest will be. I think I left it & Guest and if they RSVP'd with a guest, I found out their name for the placecards.

Here's the article from The Knot on addressing invites - maybe this can help

Whether you're hiring a calligrapher to pen the names of your invited guests or you're trying your own hand at the task, know the proper procedure. Here are the ins and outs of addressing invitations, right at your fingertips.

THE OUTER ENVELOPE
This is where you write the recipients' full names, official titles, first names, and the rest. It's where tradition is upheld, decorum celebrated; that means no cutting corners with abbreviations like Dr., NY, or St. (Mrs., Mr., Ms., and Jr. are the only acceptable shorthands). Some examples:

-- Single recipient:

Ms. Abigail Ansch
44 Acorn Drive
Houston, Texas
Zip Code (very, very important)
(If the single guy or girl is bringing a date, get the individual's address and send a separate invitation; '& Guest' on an outer envelope can be impersonal. Roommates who aren't honeys should also each receive their own invite.)

-- Married couple, traditional:

Mr. and Mrs. Harold Paris
92 Pacific Avenue
and so on...

-- Married Couple, modern:

Harold and Emma Paris
92 Pacific Avenue
and so on...

-- Married couple, different names, or unmarried couple, living together:

Professor Connie Chideya
Doctor Darren Duncan (list the names in alphabetical order)
18 Blueberry Road
and so on...

-- With kids:

Names of children under 18 need not appear on the outer envelope, but over-18-ers who live at home should either appear on their parents' envelope or, preferably, be sent their own invitation. Example:

Mr. and Mrs. Ebert Estonia
Farrah Estonia
195 Oak Boulevard
Chicago, Illinois
Zip Code
or
Farrah Fisher Estonia
Mailbox 13301
Harvard University
etc.

THE INNER ENVELOPE
Formal invitations are always slipped into an unsealed inner envelope to be placed inside the outer envelope. They are addressed in a more informal fashion -- typically only title abbreviations and last name -- and include the names of all invitees at the address, including children.

-- Single recipient, traditional:

Ms. Ansch

-- Single recipient, casual/intimate wedding:

Abigail
or
Aunt Carol

-- Married couple:

Mr. and Mrs. Bailey
or
Ben and Tamika

-- Married couple with different names, or unmarried couple, living together:

Prof. Chideya and Dr. Duncan
or
Darren and Connie

-- A family:

Mr. and Mrs. Estonia
Farrah, Gilbert, and Harriet (kids)

I've also seen this as a modern way:

Mr Joe & Mrs Jane Doe
address
address

I like both of the modern ways - I like giving each person their own identity...but that's just me.