Window Envelope

Window Envelope - An envelope with one or two openings (cutouts) on the address side through which a delivery address or barcode printed on the letter or insert placed in the envelope can be read. The openings must be covered with transparent material (such as glassine) for certain types of mail (such as registered mail).

[Category=Postal ]

Source: USPS, 04 November 2009 14:16:05, http://www.usps.com/cpim/ftp/pubs/pub32/pub32q_z.html

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Window Envelope - An envelope produced with one or more openings, usually glassine covered, through which the address of a direct-mail piece shows along with some color or teaser copy, if there are two areas. The window envelope is preferred for computer-addressed personalized mail which can be folded to show the address and thus not need a separate Addressing_ on the envelope.

[Category=Database Marketing ]

Source: Postcom, 17 April 2010 09:16:20, http://postcom.org/public/admail_image/glossary.htm