Where the ordinary remedy fails, we must have recourse to what is extraordinary.

Explanation

(English-origin maxim.) When standard remedies prove inadequate, the law provides extraordinary ones — writs of mandamus, habeas corpus, and prohibition exist precisely for when the ordinary course of justice falls short.

Where this applies

• A money judgment proves uncollectible, so a party seeks an equitable remedy instead.
• The standard legal process cannot redress the harm, and extraordinary relief is sought.