"Loss without injury." This phrase is used in tort law when one person causes damage or loss to another for which the latter has no remedy. (For example, opening a burger stand near someone else's may cause them to lose customers, but they will have no legal recourse.)
(Kanun) Volenti non fit iniuria/injuria (Latin: "to a willing person, injury is not done") is a common law doctrine which means that if someone willingly places themselves in a position where harm might result, knowing that some degree of harm might result, they will not be able to bring a claim against the other party in tort or delict. Volenti only applies to the risk which a reasonable person would consider them as having assumed by their actions; thus a boxer consents to being hit, and to the injuries that might be expected from being hit, but does not consent to (for example) his opponent striking him with an iron bar, or punching him outside the usual terms of boxing. Volenti is also known as a "voluntary assumption of risk."