The three important requirements of envelope addressing are accuracy, legibility and good appearance- in that order. The examples shown in the illustration the rules to be followed.
1. Begin the first line about half way down the envelope, leaving at least 40 mm of clear space for the postmark.
2. Type your correspondent’s name exactly as he uses it himself and be sure to spell it correctly. To fail in t!is is to be discourteous as well as careless.
3. Type in double line spacing using either the indented or the blocked form of layout. The indented form makes for easier reading and for quicker sorting at the Post Office, but there is a growing preference for the blocked form on the ground that it is time-saving for the typist. (Single line- spacing and the blocked form are often adopted for the plates and stencils used with addressing machines.)
4. Don’t abbreviate such words as Road, Street, Avenue. It is more helpful to the Post Office when they are typed in full.
5. Type the name of the town in block capitals and add the name of the county or region—in full, unless there is a recognized abbreviation for it, and preferably on a separate line. But when a postcode is used and it is desired to restrict the number of lines, the county name or its abbreviation may be written on the same line as the town name.
6. In general the name of the county is necessary to facilitate ate sorting, but it may be omitted from addresses of large and well-known cities and towns (e.g. Liverpool, Cardiff, Glasgow) and of county towns that give their name to the county (e.g. Durham, Lincoln, Gloucester).
7. Where it is known, add the postcode on a separate line at the end. (The first or outward half of the code represents the town to which the letter is going; the second or in ware half, either the street, part of a street, or even a particular address that receives a large amount of mail.)
8. Type such words as Personal and Confidential in the bottom left-hand corner. (They may be typed in the upper left-hand half, above the addressee’s name but only when they are no higher than 40 mm from the top edge of the envelope.)
Meanwhile How to Reply envelopes?
It is not necessary to include a stamped, addressed envelope in the course of a normal business transaction. But a reply envelope is necessary:
(I) when your correspondent has indicated the need for one, as when a theater booking is made by post,
(ii) when you seek information as a favor, as where you write for a testimonial, since you are putting your correspondent to some trouble and it would not be right to put him to expense as well.
Note; Envelope Addressing
The examples show, respectively, the indented form of address and the blobbed form of address. In the second method the word “Confidential” could be placed at the bottom left or, more usually, the top left corner of the envelope addresing.