1- I would appreciate it if someone could tell me that what the natives call the official sheet of a company, with the name and address of this company printed at the top?
Please consider the following image:
Meanwhile I would be thankful if you could let me whether the following terms are idiomatic in English or you use some other equivalents for them:
-2- Company statute
-3- Gazette (an official newspaper which contains the latest changes of the company's officials and responsible)
I would appreciate it if someone could tell me that what the natives call the official sheet of a company, with the name and address of this company printed at the top?
It's called letterhead.
Company statute
In a company's charter, the rules outlined there are called bylaws.
However, insofar as rules created by your boss and others in authority above you - which may or may not be written down - popular ones for that include policies and guidelines.
Gazette (an official newspaper which contains the latest changes of the company's officials and responsible)
Newsletter is the traditional term here and probably the most appropriate.
These days this may be done via email, if internal to the company only, and the term I've heard used is communique - though that's a generic term for any company-wide email in a pretty format.
