DVM LAW OFFICE: Forensic Signature Biometrics

Upload 5–7 Reference Specimens

Add between 5 and 7 verified genuine signatures by the known author. Multiple specimens let the analyzer measure the questioned signature against the author's natural range of variation, which is the standard forensic practice. Drag-and-drop or paste PNG, JPG, or WEBP images at the highest available resolution. Use the ‘Add specimen’ button to go beyond the default five.

Upload the Questioned Signature

Add the signature under examination in the second panel. Make sure it is clear, well-lit, and cropped tightly. PNG, JPG, and WEBP are accepted.

Run the Analysis

Click 'Run Forensic Analysis'. The pipeline compares the two signatures across the following forensic checklist:

• Micro-tremors — irregularities indicating rushed or forged strokes
• Baseline slant — tilt and stroke-angle consistency
• Stroke pressure — pressure irregularities across the trace
• Letter proportions — relative height and width ratios
• Pen-lifts / hesitation — unexpected stops or restarts
• Terminal tapers — exit-stroke matching
• Loop formation — deviations in loop shape
• Spacing & rhythm — cadence across the whole signature

Review the Diagnostic Output

The right panel displays the confidence score dial, verdict (Genuine / Indeterminate / High Probability of Forgery), a forensic narrative, and a per-item discrepancy list with severity labels.

Check Chain of Custody

Every result includes a Chain of Custody block listing the biometric vendor, algorithm, version, transaction ID, and the standards referenced (SWGDOC, ASTM E2290, ISO/IEC 19794-7). See the Methodology page for how to cite this in testimony.