Your 'cites' do not support the two statements you made. Nowhere in your 'cite' does it indicate that "the "private individual" receiving the gun would have to attest to the fact that they are a VA resident and would have to ask the private individual handing over the gun if they are also a VA resident."
Edit. I read your cite again.. perhaps its just a difference of semantics. Thanks for the link.
18 USC § 922 - Unlawful acts
(a) It shall be unlawful—
(3) for any person, other than a licensed importer, licensed manufacturer, licensed dealer, or licensed collector to transport into or receive in the State where he resides (or if the person is a corporation or other business entity, the State where it maintains a place of business) any firearm purchased or otherwise obtained by such person outside that State, except that this paragraph (A) shall not preclude any person who lawfully acquires a firearm by bequest or intestate succession in a State other than his State of residence from transporting the firearm into or receiving it in that State, if it is lawful for such person to purchase or possess such firearm in that State, (B) shall not apply to the transportation or receipt of a firearm obtained in conformity with subsection (b)(3) of this section, and (C) shall not apply to the transportation of any firearm acquired in any State prior to the effective date of this chapter;
The above establishes that an unlicensed (FFL) person may only receive a firearm in and from a State in which they reside.
(5) for any person (other than a licensed importer, licensed manufacturer, licensed dealer, or licensed collector) to transfer, sell, trade, give, transport, or deliver any firearm to any person (other than a licensed importer, licensed manufacturer, licensed dealer, or licensed collector) who the transferor knows or has reasonable cause to believe does not reside in (or if the person is a corporation or other business entity, does not maintain a place of business in) the State in which the transferor resides; except that this paragraph shall not apply to
(A) the transfer, transportation, or delivery of a firearm made to carry out a bequest of a firearm to, or an acquisition by intestate succession of a firearm by, a person who is permitted to acquire or possess a firearm under the laws of the State of his residence, and
(B) the loan or rental of a firearm to any person for temporary use for lawful sporting purposes;
The above establishes that an unlicensed person may only "transfer, sell, trade, give, transport, or deliver any firearm" to another unlicensed person they reasonably believe resides in the same State the transferor resides.
The State in question is VA, therefore, the two parties need to "reasonably believe" that they are both from VA.
IANAL, but my interpretation is that as a matter of practicality that would mean a brief conversation in which the two parties at a minimum state they are both from VA.