1. The arrangement of the address upon the envelope is largely a matter of taste. It usually occupies three or four lines, written en échelon,[23] but some writers prefer the blocked[24] formation.
2. In business letters the word street and the name of the state may be abbreviated, but in formal and informal letters it is better form to spell out in full.
3. Legibility is even more essential in the address than in the letter itself.
4. It is good form to write the street and number or the postoffice box in the lower left-hand corner.
5. The abbreviations No. and # before the figures in the street address should be omitted.
6. In care of should be written out in full.
7. The stamp should always be placed in the upper right-hand corner, as a convenience to the postoffice officials. Care should be taken to affix the stamp neatly, as carelessness in this respect reflects upon the sender.
8. Punctuation may be omitted at the ends of the lines; otherwise use a comma, except at the end of the last line. {124}