Beginning in January, 2012, payment settlement entities (PSEs) were required by the Housing Assistance Tax Act of 2008 to report on Form 1099-K all payments made in settlement of payment card transactions (e.g., credit card).
Filing Deadlines & Procedures
1099-Ks were mailed to merchants by January 31, 2013. Electronically filed 1099-Ks are due to the IRS April 1, 2013 (normally March 31), while paper 1099-Ks are due February 28, 2013.
You can find more about the 1099-K and other information returns at the IRS Third Party Reporting Information Center.
You may also want to see Frequently Asked Question about Backup Withholding.