eIDAS
BOSA
EUR
Yes, electronic signatures are generally legally valid in Belgium under eIDAS and sufficient for most contract types without a form requirement. canusign uses the simple electronic signature (SES); for documents with a statutory written-form or notarial requirement it is not sufficient.
In Belgium, you can digitally sign most contracts, including: Commercial contracts. Exceptions are: Notarial deeds.
The responsible authority in Belgium is BOSA. They oversee compliance with legal requirements for electronic signatures.