Woltz & Welstein provides an unmatched authentication service.

To prove it, we guarantee the reimbursement at new value of the checked item if our assessment proves to be incorrect.

Unique experience. High quality service.

Delivery and return costs are included in the price.

For authentications carried out in the workshop, you benefit from insurance covering the loss or theft of your item.

Guarantee of authenticity

During our evaluations carried out in the workshop, we include in each item checked, a fully secure authentication token allowing you to access the certificate of authenticity at any time via a simple smartphone.

We have the trust of many partners

Official Documentation

Fair Assessment

Our experts calculate the item's rating which is updated every year and updated on the certificate of authenticity.

We provide you with a metal card linked to the secure online certificate of authenticity and recorded in blockchain. The certificate is recognized by courts, insurers and other auction houses as a digital document identifying without dispute the authenticity of the article.