The inclusion in your commercial documents of a reservation of title clause is strongly recommended. This specifies that the supplier remains the owner of the good until it has been paid entirely and enables the supplier to recover this goods more easily in the case of a insolvency proceeding.
To be effective, this clause have to appear on as many documents as possible, particularly in the general terms and conditions of sale and on the front of the delivery form, near to the client's signature.
It is also possible to send to each customer a framework agreement relative to this clause, an example is attached.