One of the commonly used methods for determining the authenticity of the painting is the analysis of signature placed on it. However, unmistakable confirmation of authenticity may apply only to signatures of sufficiently high quality. The article indicates, from a handwriting expert viewpoint, which properties of signatures are significant to their identification, and which are not, and therefore, that in some cases, despite the correspondence of signature with the exemplars, conclusion about its authenticity is invalid.
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