Is registered mail sufficient to protect me legally?

Registered Mail offers you extra certainty. The following table shows you the difference between both types of mail. 

Only the addressee(s) or those with a postal mandate from the addressee(s) can accept registered mail. The item is only delivered after signing for receipt and checking the ID card of the addressee(s) or postal proxy. The sender determines who the item must be handed over to.  

Choose registered mail if you want to prove that your item or letter was sent, without any dispute concerning the destination. In some cases, registered mail is even required by law. Use registered mail for: • official, confidential, original documents • termination of contracts (tenancy, insurance, energy, etc.) • commencement of contracts (insurance, telephone, etc.) • official correspondence with your employer • documents related to your health or that are important to you • a dispute • small gifts