What is the general template for English written notice format?

General template for English written notice format:

1, all teachers and students will be required. (All teachers and students must)

2. I hereby inform you. This is a message for you.

A written notice has the following characteristics:

(1) There is a notice or announcement mark in the middle of the text of the written notice.

(2) In the lower right corner of the text, write the name of the unit or organizer that issued the notice.

(3) Write the date of the notice in the lower left corner.

The common conclusion is:

Everyone should attend. Everyone should attend.

Be sure to attend on time. Be sure to attend on time.

Please/be sure to attend on time. Please be sure to attend on time.