Vendor Onboarding process

Hi,

I am writing a process document for vendor on-boarding.

If anyone has such document, please upload here.

My question here is, Once the business receives vendor information, how can the business verify the information, before keying it in Oracle.

Say vendor ABC LLC gave, his TIN( Tax Identification Number ) number as 123.

How does the business verify and validate that TIN 123 belongs to ABC LLC ?

I hear there is a IRS website, where one can verify this.

Can someone point me to the exact link, please ? Any other suggestions, recommendations are welcome.

Thank you,

Lily