Earlier a citizen shared opinions of the tracing app through the hotline 1823. The citizen then received an email reply from the office on May 23, which was also sent to 427 unknown citizens, with all of their email addresses clearly stated in the recipient column.

The office said that the incident didn't involved the content of the inquiries and other personal information. Invetigation has been initiated after 20 citzens enquired about the incident.

The office has sent its apologies to affected individuals as well, saying that the email was supposed to be sent to an individual, instead of mass recipients. It has also informed the Office of the Privacy Commissioner for Personal Data.

The office on the other hand ordered the contractor to remove the involved staffer from the position and issued a warning letter to the contractor to avoid similar mistakes in the future. The contractor confirmed it will make sure staff will carefully follow the guidelines and will explain to new workers in details.