IMPORTANT – Read before hiring
To avoid paying for a certificate that may result in an unfavorable conclusion (G1, G2, or G3), we recommend first performing a pre-assessment. This allows us to verify if there are sufficient elements to support authenticity before the certificate is issued. If the item is eligible for certification, the pre-assessment fee will be fully deducted from the certificate cost.
How it works
Option 1 – Recommended flow
- Request a Quick Opinion.
- If there are sufficient elements for certificate issuance, you will be invited to purchase the Certificate of Authenticity.
- The amount paid for the Quick Opinion will be fully deducted.
Option 2 – Direct certification
If you have already received guidance from Glórias or require a formal certificate regardless of the conclusion, send photographs of the item after purchase. The analysis will be performed and the certificate issued according to the results obtained.
About Glórias
Mathias Meyer has been a specialist in autographs, manuscripts, and historical documents since 2010. A member of the International League of Antiquarian Booksellers (ILAB), he works with collectors, sellers, institutions, sports clubs, and auction houses in Brazil and abroad. All analyses are personally conducted by Mathias Meyer, as artificial intelligence does not yet allow for a reliable assessment of an item's authenticity and market value.
Glórias authenticity scale
G1 — Not authentic
G2 — Probably not authentic
G3 — Authenticity undetermined
G4 — Authenticity strongly supported
G5 — Authenticity exceptionally supported
What you receive
You receive a professional digital certificate in PDF, in Portuguese, digitally signed and stamped, with a unique reference number and an estimate of the item's market value. Delivery time: up to 3 business days.
Who this service is for
✔ Collectors
✔ Sellers
✔ Auction houses
✔ Antiques dealers
✔ Athletes, artists, etc.
✔ Sports clubs
✔ Museums and institutions
✔ Lawyers
✔ Insurance companies
Prices
✔ Certificate for item with 1 signature: R$ 490
✔ Certificate for item with 2 or more signatures: R$ 790
If you have already purchased a Quick Opinion, you will only pay the difference corresponding to the certificate.
Additional options
✔ Certificate in English: + R$ 90
✔ Printed version sent by mail: + R$ 90
Important
✔ The Certificate of Authenticity is issued based on the technical analysis of the item and the information provided by the client.
✔ The conclusion may indicate different levels of authenticity support (G1, G2, G3, G4, or G5), according to Glórias' exclusive methodology. Due to the technical and personalized nature of the service, the certificate is non-refundable.
✔ The presentation of new concrete and relevant elements may justify a re-evaluation of the item. Should the conclusion change, a new certificate will be issued upon payment of an update fee of R$ 90.
Do you have an exceptional piece?
In addition to certification, Glórias may be interested in acquiring the item directly or offering it on consignment to its network of collectors.
