Sinn Fein are calling on the Strabane SDLP to clarify how they are helping people claiming incapacity benefits.
In November 2011 local SDLP constituency representative Daniel McCrossan claimed that their office had been inundated with enquiries relating to welfare assessment questionnaires.
He claimed that in the first two weeks of November 2011 the office had dealt with 120 cases of people seeking help on how to fill out welfare assessment forms.
But Sinn Fein have said if this was the case then they would have represented more than 11 people at welfare tribunals in the past two years.
However, SDLP West Tyrone MLA, Joe Byrne says Sinn Fein have totally misunderstood the situation...