Letter

opening paragraph in a straightforward manner.
The body of the letter should contain one or more paragraphs, each dealing with a separate aspect of the subject matter.
The final paragraph should spell out what you want to happen next.
It is crucial to adopt a suitable tone.
Be clear, concise, and to the point, avoiding superfluous matter, but not too blunt or abrupt.
Keep the language plain and simple where possible.
Refer to sample letters on the internet for further guidance.

without any extra information. Syn pertinent.
Expressed clearly and without using any unnecessary words.
The general attitude or feeling expressed in a piece of writing.
Explain the details of sth in a simple, clear way.
The ideas or information in a book, letter, painting, etc.
Uncomplicated and easy to understand. Opp convoluted.
The main part of a book, article, text, etc.
Write or say sth clearly or firmly.

of sth to show what all of it is like.
Saying what you think even if it offends or upsets people.
Unnecessary.
Speaking or acting with few words and in a way that seems unfriendly or rude. Syns. Brusque, curt.

he needed? – Yes, he stated it very clearly.
2. Her tone is rather brusque, isn’t it? – Yes, I find it rather abrupt.
3. Did you find some model letters/ - Yes, I found some sample letters on a website.
4. He should tell her the problem clearly. – That’s right; he’s got to spell it out.
5. Did you enjoy the programme? – No, I wasn’t interested in the subject matter.
6. Was the complaint in the introduction? – No, I put it in the body of the letter.
7. Is that detail really necessary? – No, it’s superfluous.
8. Is the letter easy to follow? – Yes, it’s very straightforward.

would give for formal letters in your own language?
Where is it the same, and where does it differ?

you that I will be leaving at the end of June.
(used for giving information)
I am writing to inform you of my intention (a plan to do sth) to terminate (end or stop sth) my lease (a legal agreement for renting a property).
I am writing to enquire whether…
(used for asking a question or making a request)
I regret to inform you that…(used for giving bad news)
I am delighted to inform you that…(used for giving good news)
I am writing in response to your appeal for (an urgent or sincere request for people to give money, help, etc.) aid in…
(used for replying to an advertisement, etc.)
Please accept my sincere (expressing what you really think or feel) condolences (the things you say to show sympathy when sb has just died)
(used for expressing apologies, sympathy, etc.)