Abstract: An introduction on the classification of signing-pen was related and a review on the recent progress of methods for testing of components in ink was presented covering mainly the last decade and relating especially to methods of spectroscopy (Raman spectroscopy, IR spectrometry, micro-spectrophotometry, UV-VIS derivative spectrophotometry), chromatography (TLC, GC-MS, HPLC, HPCE, PGC) and integrated analysis (19 ref. cited).