Seeking Help: Can You Share Essential HR Letter Formats for Various Situations?

Dear Sir,

Would you please provide me with some HR correspondence letter formats as follows:

1. Joining letter format
2. Resignation letter format
3. Appreciation letter format
4. Offer letter format
5. Appointment letter format
6. Salary increment letter format
7. Promotion letter format
8. Transfer letter format
9. Warning letter format
10. Show cause letter format
11. Termination letter format

Thank you,
Emdad
Dhaka Regency
Bangladesh
88-0171-333-2623

Hi,

I would like to request assistance in crafting a more effective introduction letter to educational institutions (colleges) for the purpose of recruiting candidates.