These two kinds of invitation letters are further subdivided into personal and business invitation letters. An individual writes a personal invitation letter, whereas a firm writes a business invitation letter. A personal invitation letter is sent to invite someone to an event such as a party or dinner. This letter should be written in the first person and address the recipient by their name. It should also include the date, time, and location of the event. Examples of topics for a personal invitation letter include "An Evening with (name)," "A Holiday Party," and "Your New Year's Eve Bash." A business invitation letter is used to invite people to attend a meeting or event held by a company. This letter should also be written in the first person and address the recipient by their title. It should also include the date, time, and location of the meeting/event. Examples of topics for a business invitation letter include "A Sales Meeting at (company name)" and "An Open House Event at (company name)". It's important to note that not all invitations are created equal. A business invitation is considered formal and thus requires a business invitation letter. A personal invitation is informal and can be expressed through a phone call or email.