How to Create a Corporate SMS Masking Sender ID

Registering a Sender ID isn't instant, it's a regulated process run with each operator. Knowing what's required up front saves weeks of back-and-forth.

Documents you'll need

• Company legal documents: NPWP (tax ID), NIB (business ID), and SIUP (trade license).
• A Sender ID that matches your registered business, brand, or product name.
• A letter of appointment on company letterhead, stamped and signed on meterai.
• An active company website with complete information about your company or brand.
• A blank copy of the registration form you use to collect customer numbers, or a screenshot of the sign-up page on your website/app, with the site URL or the Play Store/App Store link.
• For companies in the financial sector: licensing from OJK, Bank Indonesia, BAPPEBTI, or the relevant authority.

The timeline and deposit

Approval takes 3 to 14 working days, depending on each operator's queue and how complete your documents are. A minimum deposit of Rp 2,000,000 is required to start the masking registration.

Sender ID rules to remember

• Up to 11 characters, letters or numbers.
• One-way only, recipients can't reply to a masked SMS.
• Any SMS containing a code, token, or password counts as OTP and must go through the dedicated OTP / Premium route.
• Keep traffic above the quarterly minimum (around 100 SMS per operator per quarter) or the Sender ID may be suspended.

Per-operator notes

The Sender ID is registered separately with Telkomsel, Indosat, XL, Axis, Tri, and Smartfren. On Telkomsel, traffic is split into two routes, Premium (OTP / verification) and Regular (notification / broadcast), priced the same; OTP must use the Premium route. Reactivating a suspended Sender ID on Tri carries a re-registration fee of Rp 300,000.

Zenziva acts as your liaison with every operator, preparing the paperwork, submitting the registration, and getting you to go-live with one API for all five carriers.