Traces of impressed writing is pressure of pen or pen like substances on paper and is unwilling practice of writer, a very important diagnostic tool for the examination of forensic document.Traces of impressed writing is the most important diagnostic criteria for the state of belonging to writer, insertion and overwriting like forgery. Value of traces of impressed writing findings increase with comparison of background properties for the examination of forensic documentation. To simulate of traces of impressed writing is almost impossible. Line weight and intensity continues on consistency with genuine writing. Because traces of impressed writing has changes in relation with increased speed of writing, some deep and superficial traces in writing may be detected. But, Slowness and sameness exists with simulated writings and especially with forged signs. Mentioned fluctuations are not generally found with simulations compared with real writings. Constitution of traces of impressed writing has three basic features: pen pressure on paper with writer, feature of pen tip and feature of paper. Writer may have changes about traces of impressed writing in different conditions and times.Evaluation of traces of impressed writing has some difficulties or sometimes evaluation of traces compression is not done because document papers like check, deposit slip, diploma, report card or examination paper have big differences in thickness. Studies and standardization about traces of impressed writing will make an important advance for the examination of forensic document.