National Communications Institute of Mozambique (INCM) has introduced new rules governing promotional SMS messages, requiring prior user authorization and allowing mobile operators to block such messages entirely through a mandatory control mechanism.
Under a resolution dated 2 June, the National Communications Institute of Mozambique (INCM) states that “PROMO messages may only be delivered to users who have previously authorized the respective category (whitelist) through their operator.” This effectively ends the ability to send advertising SMS without the recipient’s consent.
INCM said the change follows an increase in mass and automated promotional SMS sending, including cases linked to fraud and the use of systems that broadcast messages indiscriminately to many numbers. The regulator said these practices often bypass existing safeguards and reduce traceability.
Operators will now be required to provide, free of charge, a global blocking mechanism that prevents the receipt of any promotional SMS, regardless of whether the message comes from a short code or a mobile number (MSISDN). Once activated, the blocking must take effect immediately or within the shortest technically possible timeframe.
After blocking is enabled, only messages “strictly related to emergencies, firefighters, hospitals and ambulances” may be delivered, provided they come from senders that have been previously identified. Any promotional, commercial, or betting-related content will be prohibited.
The resolution also sets limits on mass messaging. If abusive use is detected, the operator must temporarily block message transmission, preserve minimum evidence, and notify the number owner. If short codes are improperly used, operators must suspend or block the service and report the issue to the INCM.
For compliance and traceability, the regulation requires that message traffic be routed through controlled, registered systems. In particular, A2P traffic associated with short codes must be routed through registered and auditable channels. Organizations that bypass the rules may face administrative action, including blocking or suspension, restricted access to resources, and sanction procedures, without affecting any other legal liability.
The rules apply to A2P SMS traffic covering promotional messages (PROMO), transactional and service messages (TRANS/SERV), and one-time password authentication messages (OTP). This includes mass messaging sent through both short codes and conventional mobile numbers.
For implementation, operators have 60 days to submit to the regulator a plan covering activation mechanisms, consent categories, and blocking procedures. The system must be fully operational within 180 days of the resolution being published on 2 June 2026.
Source: Lusa
