Faithful servant and friend of Jesus, the name of the traitor who delivered your beloved Master into the hands of the enemies has caused you to be forgotten by many, but the Church honors and invokes you universally as the patron of hopeless cases and of things despaired of, Pray for me who am so needy; make use, I implore you of that paticular privilege accorded to you to bring visible and speedy help where help is almost despaired. Come to my assistance in this great need that I may receive the consolations and succor of heaven in all my necessities, tribulations and sufferings paaritcularly (here mention your petition) ... and that I may bless God with you and all the elect throughout eternity. I promise you, O blessed Jude to be ever mindful of this great favor, and I will never cease to honor you as my special and powerful patron and to do in my power to encourage devotion to you. AMEN.
Further reading
The appeal to St. Jude joins a particular need with a lasting commitment to prayer. The TAN Books booklet Saint Jude Thaddeus: Helper in Desperate Cases brings together traditions about the apostle, his New Testament epistle, and devotional prayers for readers who want to understand the devotion more fully.
Saint Jude Thaddeus: Helper in Desperate Cases — TAN Books (paperback booklet) on Amazon (paid link)