Writting a business letter
Every business letter should have basic business correspondence which means that it should contain some basics to be a letter. In each type of letter there will be little changes but main body structure will stay same.

Basic main structure of letter is:
1. Opening part
2. Action or body part
3. Closing part
In the opening part first thing that writer should do is to write letterhead.
Letterhead should contain writer's name (or company name), address of writer (or writer's company) - it should contain name of a street, town (state) and country. Letterhead have to be written at the top of the paper.
Under letterhead, on the left side, writer should write address of receiver (name of the company or person, street name, zip/postal code, town name and country where letter will go. On the same line but starting from right, there should be a reference sign that explains what is number of your letter.
With receiver's address and reference sign (from a right side) opening part of letter is closed and now writer start to write action or body part of letter. Important is to know that opening part of letter is always written with same structure no matter which type of letter is writing.
Action part of business letter is main part of every letter in which writer explains why wrote this letter. Before that part, there should be written opening phrases.
Writer can start with a action part after opening phrases is written and left one horizontal line margin. Action part include three segments. First segment is known as beginning of action part.
Beginning part should contain main short and explicit presentation (usually in one sentence) about you or your company. We will present you examples later.
After beginning part writer should write a main message. It is good to leave at least one horizontal line margin between introduction and main structure. In the main message writer show what is the reason of writing his letter. Main message should be written explicit and direct because very important is that reader understand letter at the moment of reading.
After we write why we contact person or company with our letter we should write third part that is called ending or closing part.In the closing part writer write sentence on a way that reader can understand that we are business and educated person (usually should be written in one sentence).

You can see most common body ending letter sentences.
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After writer wrote whole action part he should leave one horizontal line margin and start to write closing part of letter. In the closing part there should be write a closing phrase that can show reader our full respect and knowledge.
After those closing words and of course one horizontal line margin writer should put his own signature with own hand. Under that signature there should be in type words whole writer's name (and his position in company if he have one).
