DUP leader Ian Paisley and his fellow party officers are facing legal action by his daughter Rhonda for alleged sexual discrimination.
Rhonda Paisley (left) was turned down for DUP job
She has alleged she did not get a job as a DUP policy officer last year because of her gender.
Instead, the post went to one of the party's councillors in Craigavon, Philip Weir.
A party spokesman said they were content the best person got the job at the end of the interviewing process.
He added that the matter was now in the hands of their legal team.
It is understood there were several applicants for the post.
A spokesman for the Office of Industrial Tribunals has confirmed they have received notification of a case.
However, it is understood it may not be heard for several months.
Rhonda Paisley is a former DUP councillor and ex-Lady Mayoress of Belfast.
However, in recent years she has shunned the political limelight to concentrate on her career as an artist.
She previously took a fair employment case against the Arts Council for Northern Ireland, alleging religious discrimination, which she won.