Here’s a quick checklist of things that you need in order to establish an SPRL/BVBA (limited company) in Belgium

If you are setting up an SPRL you will need:

At the bank

Proof of identity
€6200 to deposit in the account (€12400 if you are the sole shareholder)

At the notary

Bank certificate confirming existence of account and sum deposited in it
Proof of identity
Financial plan

At the Business Registration Agency

Proof of identity
Either your unique ID number or a statement from the notary confirming that you have set up an SPRL
Your degree certificate (or some other formal proof that you are competent to run a business in Belgium)