Be aware of scammers impersonating as IMDA officers and report any suspicious calls to the police. Please note that IMDA officers will never call you nor request for your personal information. For scam-related advice, please call the Anti-Scam helpline at 1800-722-6688 or go to

IMDA and ACMA signed Memorandum of Understanding for enhanced cooperation to combat scam and spam communications

Infocomm Media Development Authority (IMDA) and Australian Communications and Media Authority (ACMA) signed a Memorandum of Understanding (MOU) for enhanced cooperation to combat online scams and spam communications.


The Infocomm Media Development Authority (IMDA) and Australian Communications and Media Authority (ACMA) have signed an MOU to enhance cooperation between both counties to combat online scams and spam communications.

The MOU was signed on 18 July 2022 by the Chief Executive of IMDA, Mr Lew Chuen Hong and the Chair of ACMA, Ms Nerida O’ Loughlin at a physical signing ceremony in Singapore.

This MOU has been developed in connection with the Australia-Singapore Digital Economy Agreement, as well as the Joint Declaration by the Prime Ministers of Australia and Singapore on a Comprehensive Strategic Partnership’s objective to deepen bilateral relations and cooperation and enhance the integration of the economies of Australia and Singapore.

The MOU aims to promote collaboration in areas such as sharing information on trends and patterns of scams and spams, coordinating cross-border investigations, and exploring ways to enhance the effectiveness of the scams registry. This partnership will help both countries to better protect their citizens from online scams in Singapore and Australia.

The MOU covers cooperation in key areas such as information sharing and assistance in investigations relating to online scam and spam calls and short message services. Parties have also agreed to mutual exchanges of knowledge and expertise and collaboration on technical and commercially viable solutions in relation to such online scam and spam communications.

Commenting on the MOU signing, Mr Lew Chuen Hong, Chief Executive of IMDA said “The burgeoning digital economy sees growing international cooperation between regulators. This MOU, developed in connection with the Australia-Singapore Digital Economy Agreement, is an important step to address global issues that do not respect geographical boundaries for e.g., harms perpetrated by scams. The MOU forms the foundation for broadening collaboration, in the overall telecommunication and digital space, to ensure that it remains a trusted domain.”

Mr Nerida O’ Loughlin, Chairman of ACMA said she was pleased to further strengthen the ACMA’s strong working relationship with the IMDA. She added “Almost every Australian is impacted by unwanted calls, SMS and emails, and we know that many of our international colleagues are dealing with the same issues. This agreement will see us building stronger ties with our Singaporean counterparts to crack down on unsolicited calls and messages, particularly when cross-border issues are involved.”


Online scam and unsolicited commercial electronic messages and calls are an international problem with scammers continuing to prey on unsuspecting and innocent parties. Both Singapore and Australia recognise the importance of developing a global and coordinated approach to address these threats and for different stakeholders to work together. This MOU forms part of IMDA’s broader international approach where countries and stakeholders can work together to better combat online scam calls/SMSs.

IMDA has implemented multiple upstream measures with the Telcos to disrupt scammers’ reach to potential victims –

  1. The Singapore SMS Sender ID Registry (SSIR) was established in March 2022 to block SMSes that spoof the sender IDs of participants, which includes Government agencies and banks
  2. Blocking of scam calls in Singapore, including robocalls and those spoofing numbers of local Governmental agencies and emergency services
  3. Inserting the “+” prefix for international incoming calls so that the public will not pick up such calls if they are not expecting calls from overseas

All these efforts are part of IMDA's ongoing commitment to safeguarding consumers and maintaining the integrity of Singapore's communications infrastructure through the scams registry and other regulatory measures.

ACMA Chairman, Mrs Nerida O'Loughlin and IMDA CEO, Mr Lew Chuen Hong, shook hands after the signed MOU as part of combating online scams
Chairman of ACMA, Mr Nerida O’ Loughlin (right) and Mr Lew Chuen Hong, Chief Executive of IMDA (left) signed a Memorandum of Understanding on 18 July 2022 at a physical signing ceremony


Issued by the Infocomm Media Development Authority (IMDA)

About Infocomm Media Development Authority (IMDA)

The Infocomm Media Development Authority (IMDA) leads Singapore’s digital transformation with infocomm media. To do this, IMDA will develop a dynamic digital economy and a cohesive digital society, driven by an exceptional infocomm media (ICM) ecosystem – by developing talent, strengthening business capabilities, and enhancing Singapore's ICM infrastructure. IMDA also regulates the telecommunications and media sectors to safeguard consumer interests while fostering a pro-business environment, and enhances Singapore’s data protection regime through the Personal Data Protection Commission.

For more news and information, visit or follow IMDA on LinkedIn (@IMDA), Facebook (@IMDAsg) and Instagram (@IMDAsg).

For media clarifications, please contact:

(Mr) CHOO Hong Xian
(Communications and Marketing)
DID: (65) 6955 0221

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