Number of foreigners caught committing VoIP scams rose last year.
Immigration Department says Thai authorities deported 44 Cambodian workers.
The General Department of Immigration deported a South Korean national who is wanted in his country over drug crimes.
Immigration police raided two rental homes in Phnom Penh and arrested 121 Chinese nationals in connection with online gambling and Voice over Internet Protocol scams.
Interior Minister Sar Kheng says 70,000 foreign nationals in Cambodia are holding irregular immigration documents.
The government will remove and revoke irregular documents used by foreigners.