If you suspect the notice is not legitimate, you can contact the IRS:
WHERE TO CALL FOR HELP
If you have any questions about backup withholding, information reporting, Forms 1099, or the CP2100 or CP2100A Notice(s) and listing(s), you may call:
Technical Services Operation Customer Service SectionTelephone (866) 455-7438 (TOLL FREE) / (304) 263-8700 (not toll free)
Hours 8:30 am to 4:30 pm Monday through Friday, ET
