How can verifiers be sure they are using the right verifier?

The CERTUS universal verification technology is an open algorithm which means that anyone can use it to build a verification application.

SICPA operates a standard verifier that serves as a point of reference (www.CERTUSdoc.com). SICPA also certifies trusted verifiers from known partners and keeps an updated that can be found here: www.CERTUSdoc.com/verifier/#/trustedPartners.

Caution: Accurate certificate authentication can only be undertaken using a trusted verifier. Fraudulent operators are known to manipulate users into utilising imitation verifiers and deceptive verification processes. The best way to verify documents is either by using the verifier service operated directly by your trusted issuer or the official SICPA verifier (www.CERTUSdoc.com).