How to connect Rentsyst with AADE Digital Client?
October 5, 2026

How to connect Rentsyst with AADE Digital Client?

RentSyst supports now reporting every vehicle handover to the AADE Digital Client List automatically (Ψηφιακό Πελατολόγιο). A record is registered at AADE when the order starts and closed when the vehicle is returned.

1. Overview

RentSyst supports now reporting every vehicle handover to the AADE Digital Client List automatically (Ψηφιακό Πελατολόγιο). A record is registered at AADE when the order starts and closed when the vehicle is returned.

The integration works through your own myDATA REST API account, so records are sent under your company’s credentials directly.

2. Before you start

Prepare the following from your AADE myDATA account:

  • myDATA username (aade-user-id) of your REST API user.
  • myDATA subscription key (Ocp-Apim-Subscription-Key) issued for that user.
  • Branch number (Αρ. Εγκατάστασης) of each location, as registered with the tax office. 0 is the registered seat.

If you don’t have REST API credentials yet, follow the “How to get myDATA REST API credentials” link in the connection window.

3. How to connect

Step 1. Open Integrations in your RentSyst account. In the Aade mydata digital client list section, click myDATA Digital Client List.

Step 2. Enter your Mydata username and Mydata subscription key.

Step 3. Enter the Default branch number as registered with the tax office. Leave 0 if you operate from the registered seat.

Step 4. Under Branch number per pickup location, enter the branch number for each location. If all locations belong to one branch, use the same number everywhere.

Step 5 (optional). To report orders that already started, tick Register past orders and choose the Starting from date. Orders that started on or after this date and are in progress or completed will be registered at AADE with their actual pickup time.

Step 6. Click Connect.

4. AADE status in orders

After connecting, an AADE icon appears next to the creation date in the order list. Click it to see the order’s status.
A grey icon means the order hasn’t been sent to AADE yet. Click Send to AADE to register it manually.

A blue icon means the handover is registered. The window shows the Aade record number and the current Status. From here you can also click Cancel record at aade if the record needs to be withdrawn.

5. Linking the invoice

Each record must be linked to the rental’s invoice through its myDATA mark (Μ.ΑΡ.Κ.).

With Oxygen. If the Oxygen integration is connected and working, RentSyst takes the invoice mark from Oxygen and sends it to AADE automatically. No action is needed.

Without Oxygen. Enter the mark manually:

  1. Click the blue AADE icon in the order and select Enter invoice mark.
  2. Enter the mark that myDATA assigned to the invoice of this rental.
  3. Click Link. AADE will link the invoice to the record.