Sometimes crafters are willing to craft items for other members for "free". Basically you provide the crafter CE, matz, and money so they make the item right? Well what happens if they scam you and take your stuff instead? That never happened to me yet (because I ask them that I should hold something in value), but it might happen to other people who uh, doesn't think ahead. I suggest there should be a "Craft Assist System" where the other player (who permanently learned the recipe) allows you to temporary "learn" how to craft the item as long as you are at range with the player who permanently learned the recipe.
It would be good, because you don't have to worry about giving your stuff to people thinking they are going to craft the item for you, and then they just scam you at the end.

Yeah, I know there is a complain button and all that that will temp bann the player, but will the mods refund your stuff back? Idk. So it is a good idea to have a craft assist system just to be safe from any scamers out there.