2nd Pasword is not User ID & User's pasword but completely another password to prevent the other person from logging in e-NAVI account.
The account will be more secured by setting 2nd Password and it is available for free.
To register / change / suspend / restart the service, click the following link.
Caution
- Avoid the passwords that can be easily guessed / the same password as Rakuten ID / Password
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The characters that can be registered as the 2nd Password should be alphabet, number and/or these following characters and they should be more than 4 and less than 32 letters.
_ - . ^ $ [ ] * + ? | ( ) ! # % & = @ ; : < >
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2nd Password is not a passcode of the creditcard. For more details of each password or the differences, check the link below