What are the dematerialization methods available in the SY portal?
Written by Ossama kharbaq
Updated at July 28th, 2025
In the SY portal, the dematerialization mode corresponds to the means used to produce an invoice in electronic format in order to avoid sending it in paper format.
When a company is invited to issue its invoices from the SY portal, it must first choose the preferred dematerialization method from among those authorized by its client (relationship). This action must be carried out for each relationship on the portal.
To do this, you need to go to the file for each relationship and select the preferred dematerialization method.
The available dematerialization methods are as follows:
Dematerialization mode |
Description |
| Reliable Audit Trail (RAT) | This method allows you to send your customers electronic invoices in unsigned PDF format and free yourself from sending paper invoices. There is no electronic signature to give the document originality, nor to guarantee its authenticity or integrity. The requirements of authenticity, integrity and readability are covered by a commitment on your part to implement documented and permanent business controls to establish a reliable audit trail between the invoices issued and the delivery of goods or services on which they are based. |
| Signed PDF | This method allows you to send your customers electronic invoices in signed PDF format. The signed PDF is considered the original and exempts you from any transmission or storage of the invoice in its paper format. |
⚠️ If the chosen dematerialization method needs to be changed during the relationship, we invite you to contact your client.