Guide me in drafting an Appointment letter for company - we have never offered one

I newly joined a company, where we don’t have offer Appointment letter. Please help me to build one.
20th April 2019 From India, Bangalore

An offer letter provides a brief overview of the position and company and includes specific job details, like start date, salary, work schedule, and benefits.
20th April 2019 From India, Jalalpur

Attached Files (Download Requires Membership)

Appointment letter..pdf (51.3 KB, 3726 views)

offer letter.pdf (31.4 KB, 3578 views)