Renua leader Lucinda Creighton says a complaint to the Standards in Public Office Commission is part of a "dirty tricks campaign" against her.
She's claiming someone is trying to use the commission "for political ends".
A similar complaint relating to alleged failure to declare 'benefit-in-kind' while she was a Minister has already been dismissed by the commission.
Deputy Creighton described the anonymous complaint as "cowardly politics" - and called on the person who lodged it to come forward.