Abstract: Verification apparatus (2) comprising a writing instrument (4) having a body (6) and a grip sensor (8) for sensing grip pressure patterns of a person (10) when the person (10) is holding the writing instrument (4) and executing an intended movement, the verification apparatus (2) being such that the sensed grip pressure patterns are able to be compared with stored grip pressure patterns values for the person (10) in order to obtain information about the person (10) executing the movement with the writing instrument (4) The verification apparatus (2) may include a writing pressure sensor (14), an angle pressure sensor (24) and a gyroscope (32).