Which of the following obligations is immediately demandable?

• A. Obligation payable when debtor's means permits him to so
• B. Obligation with a suspensive condition
• C. Obligation ex die
• D. Obligation in diem

Answer: (D)

Payable on demand is the situation where an obligation is immediately demandable. When something is in diem, the creditor can request payment at any time, so the debt becomes due right away without waiting for a future date or for a condition to be met.

In contrast, an obligation that depends on the debtor’s means is not automatically due—the payment hinges on the debtor having the ability to pay. An obligation with a suspensive condition waits for a future event to occur before payment becomes due, so it is not immediately demandable. An obligation ex die becomes due from a fixed date, meaning it is not payable until that date passes.