Here are some of the most frequently asked questions that we have received so far
(and our answers)

There are three categories of questions:

1. Conceptual questions

2. Technical questions

Has your question not been covered yet? Send us an e-mail to this link.


Conceptual questions

How can we help you?

TrustO offers "Trusted Third Party Services’ in close collaboration with ministerial public officials (bailiffs and notaries). For more information about those services, click here.

What is TTPO – the principle behind TrustO?

TTPO refers to having (the use of) electronic documents in general and electronic document and data traffic in particular certified under the oversight and confirmation of a public official and their storage by using the Identification-Authentication-Timestamping-Integrity-Storage (IATIS) principle.

The document flow covers the end-to-end process: between paper and digital in both directions.

The official appointed for this purpose
takes on the role of Trusted Third-party Officer (TTPO). (
Read more)


Why should I use TrustO?

This unique concept adds value to every company, organisation, government and citizen, regardless of the level and size of the administration. (Read more)


Who can become a TTPOfficer?

InBelgium: all court bailiffs, notaries and the civil servants of the Federal Government ICT Department (Fedict) (who apply the IATIS principle can be connected to the Trusto platform).


Can I choose my own TTPOfficer?

You can work with a bailiff or notary of your choice (subject to your choice applying the IATIS principle and connecting to the TrustO platform.


Technical questions

What are the minimum technical specifications for PCs to be able use TrustO?

The TrustO application uses JavaScript technology that must be configured and authorised in the web browser.

The minimum specifications for PCs to be able use to the Java application are:

  • Windows XP service pack 3 or higher

  • Java Run-time (JRE SE) version 1.7 latest update. The link to install Java is:  www.java.com

    For 64-bit Windows OS, the Java 32-bit and Java 64-bit versions must be installed.

  • An eID card reader with driver.

    Do not forget to connect the card reader to the PC FIRST!


Which eID card reader do I have to use for TrustO?

Most of the models are configured by Windows automatically:
e.g. Omnikey models such as 3021 or 3121 are Plug & Play.

Some models require their own specific driver.
In such an event: See the manual for the card reader.

If you have a built-in card reader on a laptop,
DO NOT USE a second, external card reader!

No eID middleware may be installed for the TrustO platform.
The TrustO platform already has the middleware it needs
and can communicate with the card reader autonomously.

A card reader must be installed correctly on every PC with the associated driver.

Only one card reader can be installed on a PC.

If more than one card reader is installed, the application will not work.

A card reader is connected to the PC via a USB port.



Are there any other hardware and/or software requirements (browser, network, security)?


The browsers in the table below are supported depending on version and OS.

The TrustO browser solution supports:

Operating system


Microsoft Windows

XP (+SP3)









The HTTP and HTTPS protocols are used.
The client’s network configuration must make that possible.


The client’s firewalls must be configured to limit access
from the computer to the URLs of the TrustO application. 


All of the PCs that the client uses must be free of viruses, spyware and malware and must have anti-virus, anti-spyware and anti-malware software installed.

  • That software must function correctly (without blocking the TrustO application).

  • It must be kept current through regular updates. 

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