Optical character recognition is the recognition of printed or handwritten text by a computer. The character image is captured using an acquisition device such as flatbed scanner. In preprocessing, the system carries out data cleaning tasks, which may include noise reduction, skew detection and correction, slant detection and correction, normalization, binarization. Automatic person identification and verification is very important in the era of automation. In possession mode, a person possesses some identity card, passport, or smart card. The problem with this mode is that the identity card can be stolen or lost. Most popular methods are based on biometrics. These methods are more secure, easy to use, and there is no repudiation compared to traditional methods of person identification and verification. Writer verification is gaining in importance due to its applicability, mainly in the field of forensic area, to determine the identity of a writer in ransom notes, threat letters, suicide notes, document forgeries.