A more thorough explanation:

Definition: Jus retentionis is a legal term that refers to the right to keep possession of something until a debt or obligation is fulfilled. This right is often used in civil law.

Example 1: A landlord may exercise jus retentionis by keeping a tenant's security deposit until the tenant has paid all outstanding rent and damages.

Example 2: A mechanic may use jus retentionis to keep a customer's car until the customer has paid for all repairs and services.

Both examples illustrate the concept of jus retentionis, where one party has the right to retain possession of something until the other party fulfills their obligation. In the first example, the landlord has the right to keep the security deposit until the tenant has fulfilled their obligation to pay rent and damages. In the second example, the mechanic has the right to keep the car until the customer has fulfilled their obligation to pay for repairs and services.