What is required to legally sell a firearm to another individual in Iowa?

In Iowa, the sale of firearms does not require a background check through the FBI specifically conducted by the seller nor is it mandated that a bill of sale is created for the transaction to be legal. While verification of the buyer's Permit to Carry Weapons can ensure that the buyer is legally able to own a firearm, it is not a strict requirement for all firearm sales. In fact, Iowa allows private sales of firearms between individuals without the need for formal documentation like a bill of sale or mandatory background checks; however, having such documentation may be a good practice for record-keeping purposes. Thus, the correct answer reflects that there are no specific requirements stipulated by law for a legal sale between private parties in this context.