Collector tools
Separate confidence, provenance and price.
Seven privacy-friendly tools that run in your browser.
Signed-versus-unsigned premium
Calculate the autograph premium.
Authentication break-even
Model fees and negative-opinion risk.
Provenance-strength score
Screen six evidence areas.
COA and seller-risk checklist
Record documentation warning signs.
Signature-comparison worksheet
Structure visual notes without authenticating.
Lot versus individual
Choose a selling structure.
Autograph inventory
Print a certification-focused inventory.