You can register for NDID through TrueMoney application by following these steps:
- Select the "Me" menu.
- Select "Verification Level."
- Select "Register NDID."
- Select "Interested in Applying."
- Select "Accept Terms and Conditions."
Please note: Before registering for NDID, you must verify your identity at a TrueMoney kiosk or at a 7-Eleven store (available only in Bangkok)
For more details on identity verification: TrueMoney Support