Co-Operative Funeralcare has admitted cremating the wrong body at a service held in Gateshead last month.
It meant that a second family had to attend a service without their relative's body at all after the company made the mistake at Birtley Crematorium.
The Co-Op says that it has sacked two members of staff, after finding that they had breached procedures.
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Teesside Crown Court heard the 61-year-old made more than a million pounds profit running Albert Skip Hire in Darlington without a permit.
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The warning comes police received reports of men claiming to be builders targeting homes in Heaton.