Keep your mailing list up-to-date. The Office Store Co. maintains a list with 1,500 names, for monthly mailings, using presorted bulk mail that is not returned. Once a year, however, the company pays extra first-class postage in order to get back mail that is never received. The difference in postage is easily saved, since you won't waste future postage by mailing to "dead" names and addresses.
Jul 1, 1982