1. A negotiable document having enhanced security for deterring generation of copies of the negotiable document, comprising: a backing; a first warning mark printed on the backing and comprised of a first dot size pattern; a second warning mark printed on the backing and comprised of a second dot size pattern; and a background pattern printed on the backing and surrounding the first and second warning marks, said background pattern comprising a third dot size pattern.
1. A negotiable document having enhanced security for deterring generation of copies of the negotiable document, comprising: a backing; a first warning mark printed on the backing and comprised of a first dot size pattern; a second warning mark printed on the backing and comprised of a second dot size pattern; and a background pattern printed on the backing and surrounding the first and second warning marks, said background pattern comprising a third dot size pattern. 2. The negotiable document of claim 1 further including: an endorsement area on a first side of the backing for endorsing the negotiable document; and a pantographic background design substantially covering the endorsement area of the negotiable documents, said pantographic background design having a single color.