Easy

Only very few people I know use address labels when sending out their mails through post office. Perhaps, some businesses still using the manual way of writing their address on the envelope which is time consuming. I am thinking, well we might need a return address labels since we normally send out letters and other business correspondents to our lawyer. Last Christmas for example, I sent out over 20 greeting card envelopes to my friends and I had to write our address manually on each of them that took me an hour to finish.