signature found in Ex.B.4 through an handwriting expert. Unless the signatures in Ex.A.12 and Ex.B.4 are sent to a handwriting expert for comparison, irreparable injury would be caused to the revision petitioner/first defendant's firm. On the other hand, it is the contention of the respondent/plaintiff that the revision petitioner/first defendant's firm has forged the document with an ulterior motive colluding with the said R.Vasu and created Ex.B.4 document and they have never given any authorisation to the said Vasu and that he was only a worker. In such circumstances, the Trial Court found that the burden is cast upon the petitioner to prove that the said R.Vasu has been authorised to sign Ex.B.4 on behalf of the respondent/plaintiff's firm and therefore, no purpose would be served by sending Ex.B.4 and Ex.A.12 to a handwriting expert. In the considered opinion of this Court, there is no aberration of justice or infirmity in the order passed by the Trial Court warranting interference at the hands of this Court.