Many listings describe inks formulated to bond with paper and resist alteration. Descriptions mention fraud- and water-protection and inks that become entrapped in the paper to produce documents that are fade-, water- and fraud-resistant, helping to prevent check washing or bleaching.
Some rollerball and gel pens include a translucent ink window or reservoir so you can see remaining ink and avoid running out unexpectedly.
Many listings highlight rubberized grips—seamless or textured—with ridges or contours to improve feel and control while signing.
Security-focused pens may include a rubber base with a peelable sticky bottom or an adhesive anchor for mounting, long security chains (for example, 26.5 in.), short detachable chains, and base or anchor mounts included in some sets.
