Informal Letters

Informal letters in English typically go by the following standard:
The sender's address goes into the top right-hand corner, followed by a blank line and the date. In contrast to German, you do not write your name on top of the address in English letters.
It is still common practice to use a comma after the salutation. Despite the comma, the first line of a letter always begins with a capital letter.

To set off paragraphs in an English letter, you can either indent the first line of each paragraph (that means you 'move' the first word of the line to the right; use the tab stop key to that effect when you write the letter using an Office programme), or you can leave a blank line after each paragraph; this is called block style.

The letter is followed by a closure. Put a comma after the closure. Your – handwritten – name goes into the next line. Do not print your name under your handwritten signature in informal letters.
Note that in American English the sender's address and the date often are written in the top left hand corner.