Despite the advancing technology, signatures remain the most widely used and legally binding form of identification. Forgery is usually encountered in the form of forged signatures in contracts, last testaments, cheques, etc. Although signatures contain only a small sample of letters or schemes, the identification is possible due to the high individuality and the personal characteristics contained in each person’s signature. Consequently, a trained professional can confirm the authenticity of a signature and the author’s identity.

An adequate number of signature samples – usually over three – and preferably close in time to the suspected signature is necessary for the examination of the signature samples in comparison to the suspected signature.