File Form 1099-DIV for each person:
To whom you have paid dividends (including capital gain dividends and exempt-interest dividends) and other distributions on stock of $10 or more,
For whom you have withheld and paid any foreign tax on dividends and other distributions on stock,
For whom you have withheld any federal income tax on dividends under the backup withholding rules, or
To whom you have paid $600 or more as part of a liquidation.
If you make a payment that may be a dividend but you are unable to determine whether any part of the payment is a dividend by the time you must file Form 1099-DIV, the entire payment must be reported as a dividend. See the regulations under section 6042 for a definition of dividends.