Gary Hawken, who was 51, died of a heart attack in September and was placed in a grave in the local village cemetery in St Dennis Cornwall.
But his widowed partner Linda, was informed that his body may have to be moved as it was put in the wrong grave, according to The Daily Telegraph.
Speaking to the paper, his daugther Lindsey, 29, said that: "It is absolutely horrific.
"We put our trust in the parish and for this to happen is horrendous."