1. Friendly Letter: This is a letter written to friends, family, or acquaintances, expressing personal thoughts, sharing news, maintaining relationships, or simply conveying informal messages.
2. Thank-you Letter: As the name suggests, a thank-you letter is written to express appreciation and gratitude for a gift, a thoughtful gesture, a favor, or any kind of assistance one has received.
3. Congratulatory Letter: This type of letter conveys a message of congratulations to someone for an achievement, milestone, or special occasion such as a wedding, graduation, promotion, or even a birthday.
4. Apology Letter: An apology letter is written when one needs to express remorse for a mistake, an offense, or an oversight that may have caused harm or inconvenience to someone.
5. Invitation Letter: An invitation letter is written to invite someone to an event, such as a party, a gathering, a meeting, or a conference.
6. RSVP Letter: An RSVP (Répondez s'il vous plaît, meaning "Please respond") is a response to an invitation, where the invited person confirms or declines their attendance to an event.
7. Letter of Sympathy: This letter offers support, comfort, and condolences to someone who has experienced a loss, setback, or is going through a difficult time.
8. Recommendation Letter: A recommendation letter is written to endorse or recommend an individual for a job opportunity, academic program, internship, or any other relevant situation based on the writer's knowledge of their skills and qualities.
9. Personal Essay: Although not exactly a letter in the traditional sense, a personal essay can be considered a form of social letter, where an individual shares their personal experiences, thoughts, or insights on various topics.
10. Business Social Letter: This category includes letters like Letters of Inquiry (requesting information), Letters of Complaint, Letters of Goodwill (expressing positive sentiment), and Letters of Networking or Introduction (to build professional connections).
Remember, these categories are not exhaustive, and there may be variations and sub-types within each category based on the specific purpose and context of the letter. The appropriate type of social letter depends on the intended audience, the message to be conveyed, and the desired tone or formality of the communication.