We are sending wedding invitations to two sisters who are living together. Whose name is first?

When addressing envelopes to two or more siblings under the age of eighteen who are living at home, the name of the oldest child is listed first followed by the names of his or her siblings in reverse chronological order. If they are over eighteen, they receive separate invitations.

We are sending wedding invitations to a couple with two children. Do we use "and family" on the outside envelope?

No. Wedding invitations are sent to the adult members of the household. In your case, the outside envelope is addressed to the parents who receive the invitations on behalf of their children. Their children's names (not "and family"), if you wish to invite them, are written on the inside envelope on a line beneath the names of their parents.

We are sending invitations to a "junior." Do we use "junior"?

If "junior" is a part of a man's name, you would include it (or "Jr.") on the outside envelope. It is not necessary to repeat it on the inside envelope unless both "junior" and "senior" are living at the same address.

Should we use numerals or should we write out the numbers?

Numerals are usually used for the street number, although it is also appropriate to write out numbers one through twenty. Numbered streets may appear whichever way is more aesthetically pleasing. Numerals are always used for zip codes.

How can I tell which envelopes are the mailing envelopes?

It is easy to tell which envelopes are which. The outside envelopes have glue on them; the inside envelopes do not and they are also a bit smaller. To avoid confusion when addressing envelopes, it is best to work with one set of envelopes at a time. Address all the outside envelopes first. After those are all addressed, start addressing the inside envelopes. That will make it almost impossible to address the wrong envelopes.

I am addressing an envelope to a man and a woman who are living together. Whose name goes first?

The woman's name goes first.

A number of our friends are seeing somebody. We would like to invite them to our wedding. How is that done?

The nicest way to invite dates is to call your friends, get the names of their dates, and send them each an invitation. A less formal way is to address the inside envelopes with either "Mr. Clayton and guest" or "Miss Clayton and escort." Women who feel that an escort is unnecessary in this day and age prefer "Miss Clayton and guest" or "Ms. Clayton and guest."