1. Introduction-The History of Signature Use2. Concept of Signatures as a Motor Program3. Signature Styles4. Complexity Theory5. Genuine, Disguised, and Simulated Signatures6. Examinations of Copies; Inference from Static Signatures7. Effects of Writing Instruments and Writing Substrate8. Effects of Age, Illness, and Impairment9. Modular Method of Signature Examination10. Validation and Reliability11. Minimizing Bias12. Conclusions; Testimony13. Famous Signature Cases14. Introduction to Digital Signatures