Sender ID Rules and How-To
An SMS sender ID is the name recipients see instead of a number. In Australia it is 2 to 11 characters, cannot receive replies, and has to be registered with the ACMA Sender ID Register before it can be used.
SMS sender ID use cases for AU businesses
Concrete SMS sender ID use cases for Australian businesses: brand promos, launches, reminders, one-way updates and when you need a dedicated number instead.
SMS sender ID requirements: format checklist
Check SMS sender ID requirements before you request: 2–11 characters, standard ASCII, one non-digit, no spaces or underscores. SMSFlow format checklist.
SMS spam guidelines Australia for Sender ID sends
Practical SMS spam guidelines Australia for businesses using a Sender ID: consent, identification, opt-out, and list care in SMSFlow.
ACMA SMS Sender ID: what Australian businesses need to know
Overview of the ACMA SMS Sender ID Register, what registration means for Australian businesses, and how SMSFlow lodges your request with ACMA.
Register SMS sender ID in SMSFlow
Step-by-step: request an SMS sender ID in SMSFlow Account settings, lodge via ACMA, typical 24-hour decision, format rules, and reply limits.
Sender ID vs Dedicated Number | SMSFlow
Compare SMSFlow sender IDs and dedicated numbers: brand display versus customer replies in Inbox. Decide which fits one-way SMS or two-way chat.
SMS sender ID cannot reply: common issues and fixes
Recipients can't reply to an SMS sender ID. Learn why that's normal, how dedicated numbers enable two-way SMS, and how to fix ACMA approval and Inbox reply issues in SMSFlow.