The company asked to write a notice to employees to buy social security.

This is easy to write, can you write it like this:

notification

In order to implement the requirements of laws, regulations and government documents, the company decided to buy social security for each employee, which is the company's concern for employees and the embodiment of the company culture. No employee can shirk it without proper reasons. If he has purchased social security from other units or individuals, he must provide insurance invoices to the company so that the company can handle social security for other employees in time.

Hereby inform you

Xx department of Xxxx company

X year x month x day