In cases of unjust enrichment, a person who has transferred something to another in fulfillment of an obligation may demand its return from the so-called creditor (the recipient). In legal relationships arising from unjust enrichment, the creditor is the injured party, while the debtor is the person who has received a pecuniary benefit by acquiring or retaining property without legal grounds.

For the emergence of such an obligation, the fact of unjust enrichment itself is important, not the specific grounds that led to the enrichment. Such a fact may result from both lawful and unlawful actions of the enriched person, as well as similar actions by the injured party or third parties. The purpose of the legal institution of unjust enrichment is to recover property acquired without justification and thereby restore balance and fairness in property circulation. For this purpose, the pecuniary benefit must be returned to the person at whose expense another's property increased, i.e., the unjust enrichment. (Restoration of the person's original property-legal status, or equalization of the enrichment).

The lack of grounds for enrichment may be based on various circumstances, including lawful actions, except for exceptions specified by law.

In cases of unjust enrichment, fault is irrelevant; what matters is the fact that one person's property has been transferred to another's ownership without legal grounds.

In cases of unjust enrichment, the injured party is compensated to the extent by which the recipient has been enriched.

Restoration of the person's original property-legal status and equalization of enrichment arising from unjust enrichment does not constitute a form of civil liability.