- **Formal Letters:**
- Used for professional or official communication.
- Follow a strict format with sender's and recipient's addresses, date, formal greeting, and closing statement.
- Types include cover letters, business inquiries, and thank you notes.
- Delivered through mail or email, depending on urgency and preference.
- **Informal Letters:**
- Personal letters written to friends or family.
- Casual language with a conversational tone.
- No strict format, but typically includes sender's details, date, salutation, body, complimentary close, and signature.
- Can discuss personal news, congratulations, invitations, and more.
- **Writing Tips:**
- Choose the right type of paper for formal letters.
- Use block or indented form for formal letters.
- Include addresses, date, salutation, body of the letter, and a complimentary close.
- For informal letters, use a friendly greeting and a personal tone.
- Share personal news and feelings in informal letters.
- End with a friendly closing like "Take care" or "Love" in informal letters.
