Assets accumulated by one of the spouses during the marriage become part of the undivided co-ownership of common property, which means that both spouses jointly use the assets, which are part of the common property, and they are also jointly liable for any debts. After the marriage has been concluded, the spouses can decide together to extend or reduce their joint assets laid down by law by way of an authenticated deed drafted by a notary. To find out more, do ask your notary for advice and he/she will explain to you the consequences of each of the different options.
If one of the spouses dies, a civil law notary acting as judicial commissioner will divide the common assets (which are not subject to any judicial proceedings) according to the rules applicable to succession proceedings.