In 2018, we provided the three perfumery brands of the Douglas group with a service of normalization, deduplication, correction and deletion of contact data to activate an email/SMS communication campaign aimed at users of loyalty programs. The customer is invited to actively participate in the implementation of the European GDPR thanks to an ad hoc application of the MAIL MAKER platform that produces a unique link pointing to Consent and Contact Data Update Forms, pre-filled by individual master data. Data and consent update requests with log files complete with Timestamp and connection IP are returned to the customer's CRM over a secure channel.