To open a Livret de développement durable et solidaire, an agreement must be signed between the institution and the customer.
In this agreement, the customer must declare on his or her honour that he or she is a taxpayer whose tax residence is in France, or the spouse or civil solidarity partner of such a taxpayer, and that he or she does not hold any other Livret de Développement Durable et Solidaire with any other establishment whatsoever.