Anything that you'd use in an informal communication is inappropriate for a business letter. This includes slang, text_speak, emojis, and anything off_color or casual. If you're used to communicating mostly with friends, family, or even co_workers you've worked with for a long time, an appropriate closing for a business letter will probably feel pretty stilted at first. Don't worry about it – your colleague or business associate won't feel that way when he or she reads your correspondence. What seems unnatural to you will feel respectful and polite to the recipient.
Beginning the Letter. Know the format: There are some business standards which need to be followed. One must use a common font to type a business letter. One must use indentation, paragraphs, margins etc. The text must be typed in black color only. Choose the Right Kind of Paper: One must print a letter in a letter sized paper. The standard size of the paper is A4.