In civil law, achalandage is often confused with clientèle. Both would allow an enterprise to protect the value that represents its relationship with its usual customers. A patrimonial right, therefore, ensures the withholding of customers without regard to the force of attraction of the enterprise, i.e. not only its ability to retain, but also to attract other customers. Yet, the force of attraction of an enterprise is the key element of the legal valorization of efforts done to maintain and develop a market, whether by granting a droit à la clientèle, or protecting, in common law, goodwill. Meaning "to attract customers", the concept of achalandage embodies this vis attractiva and allows to protect the privileged relationship of a business with the public beyond its regular customers. Besides, achalandage should not be reduced to its attractive sources, which are the assets and skills of the enterprise. Taking instead the form of a "negative right" on the force of attraction resulting of those sources, achalandage is, despite its accessory and volatile characteristics, a property in itself.