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Vendor EFT

Establishes vendors and manages Electronic Funds Transfer (EFT) activity for same. Oswego County promotes electronic funds transfers, minimizing manual checks. A W9 is required to be submitted with the EFT application. Please email to inquire about the necessary forms.

Vendors: If you are an Attorney or a Landlord, please note this on your W9.

If you are a NYS or Federally Certified MWBE, DSVOB or Small Business, please provide a copy of your NYS certification with your W9 Form (showing issue and termination dates of certification.)

The IRS requires the County to have a W9 for all Vendors.  

If you have any questions or would like to submit your W9 or EFT documentation via e-mail, please send to for processing.

IRS rules regarding W9's:

You may be subject to backup withholding and the payer must withhold at a flat 24% rate when:

  • You don't give the payer your TIN in the required manner. TIN is social security number (SSN), employer identification number (EIN), or individual taxpayer identification number (ITIN).
  • The IRS notifies the payer that the TIN you gave is incorrect.
  • The IRS notifies the payer to start withholding on interest or dividends because you have underreported interest or dividends on your income tax return. The IRS will do this only after it has mailed you four notices over at least a 120-day period.
  • You fail to certify that you're not subject to backup withholding for underreporting of interest and dividends.
IRS rules regarding Withholding current rate of 24% of payment for a Vendor not supplying a W9:;   

How to prevent or stop backup withholding: To stop backup withholding, you'll need to correct the reason you became subject to backup withholding in the first place. This can include providing the correct TIN to the payer, resolving the underreported income and paying the amount owed, or filing the missing return(s), as appropriate.