Ransom Note

If a double-faced card is cloaked, it will be put onto the battlefield face down. While face down, it can’t transform. If the front face of the card is a creature card, you can turn it face up by paying its mana cost. If you do, its front face will be up.

Because the permanent is on the battlefield both before and after it’s turned face up, turning a permanent face up doesn’t cause any enters-the-battlefield abilities to trigger.

Unlike a face-down creature that was cast using a disguise or morph ability, a cloaked creature may still be turned face up after it loses its abilities if it’s a creature card.