Answer:
What can you keep after giving it to someone?
Come up and we go, Go down and we stay.
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
What kind of nail can be grown?
You might accuse someone living with a stolen identity of being this.
There is a woman in a boat, on a lake, wearing a coat. If you want to know her name, it’s in the riddle I just wrote. What’s the woman’s name?