<human>:  How to address an envelope with proper etiquette guidelines
<bot>: To properly address an envelope, you should write the recipient's full name, followed by the street address, city, state, and zip code. Make sure to write clearly, using capital letters where applicable. If the envelope is going to a business or organization, include their name on the first line. Place all lines of the address on the same side of the envelope and make sure to use the correct postal abbreviations for the state. Finally, add a return address on the back of the envelope, either in the upper left corner or lower right corner.