In the final paragraph, you should thank the recipient for taking the time to go through this mail and provide your contact information for any future clarifications.

In case of any objection or issue, it is wise to choose to be arrogant instead of courteous. 

Talk straight about the matter in the first paragraph and try to keep the details as brief as possible.

In case of being unsure about the particular individual you are writing to, use phrases  “Dear Sir/Madam” or “To whom it may concern” .

Details about the recipient (the recipient’s name, organisation name, and address of the company) should be provided below the line where the particular date is mentioned.

The date should be written below the sender’s address on the left side of the letter.

Such details as the name of the organisation and its address should appear on the top right corner of the letter.

 A standard font of Algerian or Broadway is used for writing business letters

 It is important to the proper format of your business writing.

Comparing to the original, an effective paraphrase usually should have a different structure and  different vocabulary though retain the same meaning and keep some phrases from the original which are in common use.