Posted by Alpho

Once you receive a recipe, wether it's from trading a non-used one from a friend, purchasing it in in a shop, or getting it from some quest or hidden spot on the map, you can trade the recipe and keep it as long as you want. If you want to actually craft something, you have to have the recipe in your recipe list (after receiving a recipe, you press "Use Recipe" on the item in your inventory). Once you add the recipe to your list after using the item, it can no longer be tradable and can always be crafted now. You can only craft an item if you have the recipe for that item in your recipe list.

Posted by ShizGodsu

I sure as hell hope not.