A CP 575 letter is the original EIN confirmation notice issued by the IRS when a business receives a new Employer Identification Number. A 147C letter is an EIN verification letter issued later if the original CP 575 notice has been lost or cannot be located.
Here’s the practical difference—and what HR leaders, payroll managers, and small business owners should do when the original letter goes missing.
⚠️Note: This information is for informational purposes only and does not constitute formal tax, legal, or compliance advice. Always consult with qualified tax advisors, legal counsel, and your organization’s internal teams for guidance specific to your situation. Additional regulations may apply. For the most accurate and up-to-date information, refer to official government resources and regulatory agencies.