Invitee
To formally reply to a residency interview invitation, write your reply in formal business style. It is a good idea to phone the person who contacted you for the interview and accept the invitation, unless the invitation was given directly to you on the phone and you accepted on the phone at the time.
You address the envelope to the person and only put "X, Y and guest" on the invitation.
An invitation letter invites someone to an event. The invitation letter provides the time and date of the event the person is invited to.
A person can find free invitation templates online on a number of different websites. Some websites you can find free invitation templates are Squidoo, Pinterest, Psprint, and Evite.
A recipient.
A gatecrasher barges in without an invitation.
The word 'regret' on a baby shower invitation simply means the person is sorry they cannot make the baby shower for reasons they may have given you.
Generally, an invitation to treat is not an offer but an indication that a person is willing to negotiate. If the other party rejects the invitation then no negotiations take place.
That person is called a Czar.
You RSVP by either calling or emailing the person hosting the shower. Usually the invitation will tell how to RSVP.
Is a government position given to a person as a reward for his or her service to a political party called a patronage job? *it is called the SPOILS system*
If it says 'Regrets Only' then you only RSVP if you can't go. So if you can go you are not required to tell the host anything.