A courtesy call letter would normally be written to an embassy to signify a person's intention, or to request something from the embassy. The letter should be as official and respectful as you can possibly make it and would normally contain your name, address and other contact details at the top, before the main body of the letter. The letter should be addressed to the Ambassador, or His Excellency. The letter should always end with "Yours sincerely" and be signed by the person who is sending the letter. The name should also be printed at the bottom of the letter, underneath the signature. The main body of the letter should be brief, but should also contain enough information for the person reading it to understand exactly what it is you are looking to put across. Finding the balance between making the letter too brief and the letter containing too much unneeded information is vital. The envelope the letter is sent in is just as important as the letter itself. The title and name should be in the center of the envelope (His Excellency, Ambassador of (insert country name here), followed by first name and surname). The next line of the envelope should contain the street address of the embassy. The third line will contain the town or county the embassy is based in. The fourth line should contain the country name only. The US Postal Service recommends that no more than five lines be written on the front of any envelope or correspondence that is being sent to the country. Ensure that the name and address of the sender is included on the back of the envelope and that the correct postage is included to enable the letter to reach its destination.