How can handwriting help determine whether a medieval charter is authentic?

In the study of diplomatics, handwriting is a critical tool for assessing the authenticity and provenance of a medieval charter. Because paleography—the study of ancient and medieval handwriting—identifies specific styles and conventions tied to particular times and places, it allows experts to detect inconsistencies that signal a forgery.12

Handwriting helps determine authenticity through several key methods:

• Chronological Consistency: Paleographers compare the script against known styles current at the time the document claims to have been written. Forgeries often fail by incorporating legal phrases or script styles that only came into use generations later.23
• Scribal Identification: Experts can identify the hands of individual scribes or specific scriptoria. By tracing a scribe’s career through their developing, mature, and deteriorating handwriting, researchers can verify if a document fits within the known output of a specific office or center.4
• Abbreviations and Conventions: The use of specific abbreviations and shorthand, such as Tironian notes, provides evidence for dating and localization. Inconsistencies in these conventions often reveal fraudulent documents.24
• Technical Comparison: While medieval forgers often attempted to mimic ancient styles, modern analysis—including ultraviolet light to reveal faded text—can expose inconsistencies that were not visible to the naked eye.3