eBay
- Checks if city, state, and zipcode are consistent before submitting the form.
- Checks if both e-mails match before submitting the form.
- Check availability for user ID. Gives you suggestions if already taken. Also, there is an option to generate a user ID by providing the system with some words.
- Tells you password strength. In addition, it gives you a list of characteristics that comprise a strong password and checks off the list along the way as your password meets those characteristics.
- Checks if both passwords match before submitting the form.
- Captcha phase is easy to read.