The issue of studying objects of a handwriting examination holds an important place in the modern forensic examination and has a long establishment and development history. Notwithstanding multiple publications and explanations regarding basic handwriting sample collection and presentation principles, in practice, experts often encounter problems caused by insufficiency of submitted materials or their non-conformance with the procedural requirements. This article is dedicated to review of the main characteristics of handwriting examination objects, identification of standard mistakes, and development of recommendations for practitioners of investigative units filing objects for an expert examination.