A more thorough explanation:

Definition: Jus obligationis is a Latin term that means "a right of obligation." It refers to a personal right that arises from another person's duty and is valid only against that person.

• If someone owes you money, you have a jus obligationis to collect that debt. This means you have the right to demand payment from that person, but only that person is obligated to pay you.
• Another example of jus obligationis is a contract. When you enter into a contract with someone, you both have rights and obligations. If one party fails to fulfill their obligations, the other party has the right to demand that they do so.

These examples illustrate how jus obligationis is a personal right that arises from another person's duty. It is not a right to a specific property, like jus ad rem, but rather a right to demand that someone fulfill their obligations to you.