About 250 Malawians were last Friday arrested and kept in Police custody on various charges mainly illegal entry and overstaying in Tanzania.
Songwe Border Post Public Relations Officer Yusuf Shaibu confirmed the development in an interview with Zodiak, a private broadcaster in Malawi on Thursday.
Shaibu told the radio that the Malawians have already appeared before Court in Dare salaam.
He said they were slapped with hefty fine of which most of them failed to pay.
According to the Police Publicist, the people were fined ranging from One Million, 500,000 and 300,00 Tanzanian Shillings.
They will in default, be sent to Morogoro Farm where they will be involved in Farm works as labourers.
Recently, Tanzanian authorities also arrested Malawian identified as Dr Esther Mwenitumba was employed by the government as a Chief Medical Officer at Mburahati Health Centre who submitted false documents at the department.
The development comes after hundreds of Malawians are still being kept at Lindela Prison in South Africa on similar offences waiting to be repartriated back home.