Beware of scams!

The owner of the trademark could be solicited by private companies for publications of the trademark at a high cost in unofficial registers.

These registers do not have any juridical value. We recommend you to ignore such misleading  proposals.

We kindly invite you to take a look at some examples of this scams below:
Samples of misleading invoices  
List of confusing letters received by trademark holders  
WIPO: Samples of misleading invoices 

When in doubt, please send us a copy of the invoice you have received and we will verify.