No, you are not allowed to use someone else’s bank account to deposit to your app’s digital wallet. You can only use either your own assigned Smiles Wallet Card or any of your Japanese bank accounts.
You can see your referral code as following steps.
A Smiles customer must share their referral code or QR code to their "friend".
Referral points are then earned when the referred person :
Once the transaction has been processed successfully, the invitee will immediately receive 500 points at the maximum.
To use a referral code during registration on the Smiles app, the invitee must scan the qr code or enter the referral code from the person who referred them. This prompt will appear upon opening the Smiles app before registration.
After scanning the QR code or entering the referral code, the invitee can proceed with the registration process.