Authentication Standards
Authentication Standards
5K CERTIFIED issues independent third-party authentication opinions. Explore our scope, evidence requirements, review methodology, expert process and certificate standards below.
Standards by topic
Methodology
How we evaluate submitted evidence through a defined, independent review sequence.
Learn more →Expert Review Process
How cases are assigned to isolated reviewers and escalated when findings conflict.
Learn more →Certificate Standards
What every Certificate of Authentication contains, from number to verification URL.
Learn more →Evidence Requirements
The images and markings we need to assess an item accurately.
Learn more →Scope & Limitations
Which items we authenticate today and the boundaries of an authentication opinion.
Learn more →Authentication Outcomes
Every review results in one of the following documented outcomes.
The item is consistent with authentic production based on the evidence reviewed.
The item is inconsistent with authentic production based on the evidence reviewed.
The available evidence is insufficient to reach a confident determination.
Further images or information are needed before a determination can be made.
Verify a Certificate →
Check the current status of any 5K CERTIFIED Certificate of Authentication.