• Tax ID and Legal Name: Confirm that your vendors’ tax IDs match their legal names to avoid IRS penalties.
• Addresses: Ensure that vendor addresses are valid and up to date. This is especially important if you send payments by check, as an incorrect address can delay payments.
• Non-US Vendor Registrations: If you work with international vendors, validate their tax registration numbers, as the IRS 10 match doesn’t cover non-US vendors. Third-party providers can help you validate these numbers.
  
  

• Review vendor records for redundant or similar entries. Pay close attention to different payment types or addresses that might indicate the same vendor under multiple records.
• Consider reviewing records at various levels, such as payment types and addresses, to ensure you’re not overlooking duplicates.
  
  

HOW OFTEN SHOULD YOU CLEAN YOU VENDOR MASTER FILE?

The frequency of cleaning your vendor master file depends on the size of your company, the volume of transactions, and the level of risk you’re willing to accept. Here are some recommended schedules:

1. Annually: At a minimum, clean your vendor master file once a year. We recommend doing this in September or October, allowing time to address any vendor data issues before you file 1099 forms and ensure all vendor addresses are correct.

2. Semi-Annually: If you clean the file twice a year, perform a clean-up in September/October and again in Quarter 1. This will help catch any issues early in the year, especially after the busy tax season.

3. Quarterly: Cleaning your vendor master file four times a year ensures that errors are caught in smaller batches, reducing the volume of issues that need to be addressed. This approach allows for more manageable follow-ups and fewer last-minute corrections at year-end.

4. Monthly (Best Option): Monthly clean-ups are the most proactive approach, ensuring that vendor data is regularly checked and updated. This is especially important if you don’t have continuous monitoring for watchlist checks. By conducting monthly reviews, you reduce the risk of fraud, as vendors can be added to watchlists throughout the year, and you can catch these changes before making payments.

Protecting the vendor master file is a crucial responsibility for AP teams, as it ensures the accuracy of vendor payments and reduces the risk of fraud. Regular maintenance of this file—whether annually, semi-annually, quarterly, or monthly—helps ensure that your vendor data is always accurate, up-to-date, and secure.

Remember to inactivate old vendors, revalidate your vendor data, and check for duplicates as part of your clean-up process. Additional tasks like collecting insurance certificates or performing credit checks may also be necessary depending on your industry.

For more tips on managing your vendor master file, be sure to check out the free training “8 Steps to Clean Your Vendor Master File,” where you can access bulk upload resources to streamline some of these tasks.

By staying diligent and organized, you’ll help protect your company from fraud and maintain smooth, accurate payment processing