What needs to be clarified
Preparation could establish which samples belong to the relevant person and when and how they were made. It helps to clarify which differences can be examined and what information would be needed to explain them.
Materials to prepare
- The disputed document in its available form, noting whether the original exists and where copies came from.
- Documents bearing signatures from different periods, preferably near the disputed date.
- Records of sample provenance, usual writing conditions and documented signature changes.
What to compare
- Whether the reference signatures’ authorship and timing are supported.
- Comparability of document format, signature placement, writing instrument and conditions.
- Whether the number and variety of samples support examination of persistent features.
Possible outcome of the analysis
A possible result is a period-by-period inventory assessing suitability and identifying missing documents. This can refine the assignment without confusing insufficient reference material with a negative finding about the signer.
Limits of the conclusions
A later sample is not automatically unsuitable, and visual similarity does not settle authorship. Exact stroke dating and technical alteration of a document are separate tasks, not established by signature comparison alone.