26 CFR § 1.6011-3 - Requirement of statement from payees of certain gambling winnings.
(a) General rule. Except as provided in paragraph (c) of this section, any person receiving a payment with respect to a wager in a sweepstakes, wagering pool, lottery, or other wagering transaction (including a parimutuel pool with respect to horse races, dog races, or jai alai) shall make a statement to the payer of such winnings upon the payer's demand. Such statements shall accompany the payer's return made with respect to the payment as required pursuant to section 3402(q) or 6041, as the case may be.
(b) Contents of statement. The statement referred to in paragraph (a) shall contain information (in addition to that required under section 6041(c)) as to the amount, if any, of winnings from identical wagers to which the recipient is entitled. If any person other than the recipient is entitled to all or a portion of the payment, the statement shall also include information as to the amount, if any, of winnings from identical wagers to which each such person is entitled. The statement shall be provided on Form W-2G or, if persons other than the recipient are entitled to all or a portion of such payment, on Form 5754.
(c) Exception. The requirement of paragraph (a) of this section does not apply with respect to any payment of winnings—
(1) From a slot machine play, or a bingo or keno game,
(2) Which is subject to withholding under section 3402(q) without regard to the existence of winnings from identical wagers, or
(3) For which no return of information under section 6041 is required of the payer.
(d) Meaning of terms, For purposes of this section, the terms “sweepstakes”, “wagering pool”, “lottery”, “other wagering transaction” and “identical wagers” shall have the same meanings as ascribed to them under § 31.3402(q)-1.