White ink security feature for mailer type business forms

Many business forms, particularly mailer type business forms, have the need to provide security for some of the information associated therewith so that only the addressee who opens up a mailing can see the confidential information, or a security document (such as a check, money order, negotiable instrument, or the like) or what information is on it, contained therein is in fact provided. Typical mailer type business forms are shown in U.S. Pat. Nos. 5,294,041, 5,553,774, 5,376,048, 5,174,493, and 5,201,464, which are formed from a single sheet of paper. Other type mailers (including some embodiments in U.S. Pat. No. 5,174,493) include inserts, and other business forms aside from mailers, either single ply or multiple ply, also often have the need for confidentiality. Also, many such business forms require security features so as to minimize the possibility that the documents will be misused. A business form, particularly a mailer type business form, is constructed from a sheet of paper. The paper has first and second areas, the first area having security indicia positively imaged in non-fluorescent white ink. The second area, which is preferably immediately adjacent the first area, is substantially covered by non-fluorescent white ink, with security indicia reverse imaged on it. Some security indicia may extend from the first area to the second area, being positively imaged white ink in the first area, and reverse imaged indicia surrounded by white ink in the second area. The mailer may be formed into panels by lines of weakness, and may have areas with security pantographs thereon, or areas with security printing over a portion thereof and portions distinct from the security printing receiving outgoing address indicia and postage indicia, and possibly return address indicia.