Customer.io
Day 0 after signup
Customer.io verification code
Why it works
- Lead with the purpose of the email so the recipient can quickly understand what action is needed.
- Place the verification code and its expiration detail together to make the next step and time limit clear.
- Keep supporting legal and help information below the main action so it does not distract from verification.
How it is built
- Verification headline
- Code instructions
- Expiration notice
- Terms and support details
Email copy
Verification code Please use the following verification code to confirm your email address. This code will expire in 15 minutes. 577631 By creating an account, you agree to our Terms of Service and Privacy Policy. If you need assistance, please email win@customer.io. You are receiving this email because a request was made for a one-time code that can be used for authentication. © 2026 Peaberry Software, Inc., 9450 SW Gemini Dr., Suite 43920, Beaverton, Oregon 97008