Are your guest list and budget incompatible? Try creating four lists and label them A, B, C, and D. Your A-list should include those who you cannot imagine being absent on your wedding day, such as immediate family members and close friends. Aunts, uncles, cousins and other friends you’ve stayed in touch with should make up your B-list, while your C-list should include coworkers and your parents’ friends. Finally, your D-list will include distant cousins, friends you have lost contact with and your parents’ colleagues. As your list grows and you need to eliminate people, start with your D-list and work your way backward.
It is appropriate to invite an unmarried person without adding “and guest” to the invitation, however if it is known that this person is dating someone seriously, it is thoughtful to invite his or her significant other. It is not acceptable to invite one-half of a married couple, one-half of a couple living together or one-half of an engaged couple.
Think carefully about sending wedding invitations to people you know cannot attend, as it appears to be a solicitation for wedding gifts. If there are people you would like to inform about the wedding, you may send them a wedding announcement after the wedding. If there are people you know will not or cannot attend, but who may feel slighted if they did not receive an invitation, then by all means send one.
If you work in an office of fewer than 10 people and wish to invite coworkers, the proper thing to do is to invite everyone. If you work for a larger company, you may choose to invite only a few colleagues. Remember that if coworkers are married or have a serious significant other, you must include their partners on the invitation.