Lawline svarar
I can answer your question very shortly: You are not required by law to set up such a contract after your relation ended. That sort of paper is generally to have a legal importance during or before your sambo-relationship.
The contract referred to is about splitting you and your partners furniture and place of living, so that any ownership-related conflict will be avoided when/if the relation eventually ends. If you don't have any such contract, and your relation is over, then there won't be a necessity to inventorize you and your ex belongings.
Off course it can be practical to make a list over your belongings to avoid mixing the stuff together, but there are no legal aspects of this suggestion.
Best regards