Does your Belgian company still receive paper mail from the government in 2026?
Your company has an e-Box. Have you ever opened it?
Less and less. e-Box Enterprise is the secure digital inbox through which Belgian public bodies send official mail to companies. The SPF Emploi has sent companies its ordinary mail there since March 1, 2025, and its registered letters since October 1, 2025, as long as the company has activated its e-Box. Other senders are moving the same way, one by one. Only the company’s legal representative can activate it, so a company that never did has an inbox it does not know about (facts checked October 2026).
e-Box Enterprise is described by its official site as a secure electronic mailbox that brings the official communication between a company and public bodies into one place. Registered mail (recommandé) is a postal item that someone has to sign for. The registered office is the company’s official address, recorded in the BCE, Belgium’s central company registry, which you can search on the BCE public search. We explain how it differs from an establishment unit in another article.
How did a Belgian company’s government mail work until recently?
It came by post, to one address: the registered office. Say you are a French developer who incorporated a Belgian SRL last year. Your registered office is at a domiciliation provider in Brussels, and you work from Lisbon. A letter from the tax office or the social security office reached that address, someone opened it, and you read the scan.
That model had one weakness, which our article on what happens when an official letter never reaches the registered office explains: everything depended on one address and one person watching it. It also had one strength. You only had to ask one question: did anything arrive?
What does e-Box Enterprise change, and what still arrives on paper?
It adds a second inbox, and the government is moving mail into it sender by sender. The official site lists the senders: federal bodies such as the SPF Finances and the SPF Économie, the ONSS (the social security office), regional bodies, and many municipalities. The messages include notifications of filings, certificates, reminders, reports and registered letters. The site says that “more and more” public bodies use it and that, over time, the government wants to move fully from paper to digital communication. Nothing on that page says a company must use it today.
Two senders show how fast the paper stream is shrinking:
SPF Emploi. In a notice published on February 26, 2025, the SPF said that from March 1 its ordinary correspondence to companies would go through the e-Box, with registered letters still sent by post. In a second notice, published on September 30, 2025, it said that from October 1 registered letters would also go to the e-Box, if the company has activated it.
SPF Finances. According to Securex, a social secretariat, companies that told the tax office they no longer want paper receive its documents only in digital form from November 1, 2025. Legally required registered letters stay on paper for a limited time and are meant to move to the e-Box later. We could not confirm these dates on an SPF Finances page, so treat them as reported, not official.
For the SPF Emploi, “registered” stopped meaning “paper” in seven months. A registered letter used to be the one item you could count on receiving by post. From that sender, that ended on October 1, 2025.
The notices leave one question open: what happens to a company that never activated its e-Box? The SPF Emploi pages do not say. They tell companies to check that the e-Box is activated so they miss no mail, and, if a letter is still sent by post, to give an email address for the reply or to activate the e-Box. We would not rely on a fallback nobody has described.
Paper has not gone. Since the official site says “more and more” bodies use the e-Box, some senders do not yet, and they write to the registered office as before. At Yelomex, receiving that paper is included in the €60/month subscription (excl. VAT): mail is received in the company’s name, announced by email, scanned, and forwarded physically on request, with only postage charged at the day’s bpost rate. If you order a postal power of attorney from bpost, the team also signs for and collects your registered letters at no extra charge. The e-Box is not part of that service. It belongs to your company and stays with your legal representative.
How do you check both inboxes in ten minutes?
Six points, about ten minutes, plus the time to reach your legal representative if that is not you.
Find out whether your e-Box is active. Only a legal representative can activate a company’s e-Box. The company must first be registered in CSAM, the federal digital access system, and activation uses an electronic identity card or an itsme account. If nobody can say whether it was done, assume it was not.
Name an access manager. Anyone linked to the company can get access with an eID or itsme, in one of two roles: user, who can view and manage documents, or access manager, who can also give access to others. The official FAQ describes both. A company can also have its e-Box managed through a mandatary, such as a social secretariat or an external provider, according to the SPF Santé publique.
Check the notification email. Securex says a notification goes to the email address you provided each time a document arrives. If that address is a mailbox nobody reads, the e-Box is silent.
Save what matters. Each sender sets how long a document stays in the e-Box, and documents are deleted automatically when that period ends. The site warns you before expiry. Keep a copy of anything you may need later.
Log in the safe way. The SPF Finances warned on September 12, 2025 about fake eBox notifications that lead to a copy of the login page. Its advice: never click a link in a suspicious message, and go in only through the official site or itsme.
Keep the paper channel working. Until each of your senders confirms it has moved, a notice can still arrive at your registered office.
A notice gets missed when someone watches one inbox and assumes the other is quiet.
Looking for a professional address in Brussels?
Yelomex offers commercial domiciliation at €60/month excl. VAT, in real premises in the heart of Brussels. Three-month minimum, then no notice period.
Frequently asked questions
Is e-Box Enterprise mandatory for a Belgian company?
The official site says the government wants to move fully to digital communication over time, and it does not make the e-Box compulsory today. Securex reports that the government agreement plans mandatory use for business communication with a proposed start in 2026. We have found no text that fixes an obligation for companies, so check the current position with the official site or your accountant.
Who can open my company’s e-Box?
A legal representative activates it. After that, anyone linked to the company can get access with an electronic identity card or an itsme account, if an access manager grants it. Only a user with the access manager role can give access to others.
Will I still get paper letters if I activate the e-Box?
From some senders, yes. The SPF Emploi sends its ordinary and registered letters through the e-Box when it is activated, but other senders still write to the registered office. Each sender decides, so keep the paper channel working until you know where each one stands.
Does Yelomex manage my company’s e-Box?
No. The e-Box belongs to your company and its legal representative activates and runs it. What Yelomex includes in the €60/month subscription (excl. VAT) is the paper side: mail received at the registered office, announced by email, scanned, and forwarded on request. Registered letters are signed for and collected at no extra charge if you order a postal power of attorney from bpost.
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