You require this skill category if you wish to make convincing copies of documents such as letters of credit, wills, bills of sale or any other useful piece of paper. The greater the level of proficiency in this category, the more convincing the forged documents you produce are, and the less likely that they will be recognised as forgeries. A special forgery kit with materials to make ten forged documents is available from the most disreputable guilds, but of course, forgery is a crime and that no guild will admit to teaching this skill or selling equipment to facilitate in this crime.