Upvote:1
The website for Belgiumβs Office des Etrangers refers to Annexe 3bis as an alternative to proof of regular and sufficient means of subsistance (moyens de subsistance stables, rΓ©guliers et suffisants).
That would relieve you of providing your bank statement, but not of any other documents youβve been asked to include in your visa application (e.g., itinerary, flight tickets, health insurance, employment, NOC). As you are also being offered accommodation, your cousin would want to provide a letter of invitation which states the relationship between you, the purpose of your visit, when you will stay (the dates), and where (the address).