The plaintiff had to prove that she and defendant Nos.2 to 7 were impersonated in the previous suit in which impugned consent decree dated 31.05.1989 was passed. However, both the courts below have found that the plaintiff has failed to prove the same. The plaintiff examined handwriting and finger print expert in support of her version. However, the said expert witness did not compare thumb impression of the plaintiff herein affixed on the statement made by her in the court in the previous suit admitting the claim of defendant No.1 who was plaintiff in that suit. Science of comparison of finger print is perfect science, but the plaintiff intentionally did not got her said thumb impression compared and, therefore, adverse presumption arises against the plaintiff. On the other hand, plaintiff's expert stated about her alleged signatures on the written statement filed in the previous suit admitting the claim of defendant No.1 who was plaintiff in that suit. However, science of handwriting comparison is not a perfect science. Ordinarily expert engaged by a party to compare handwriting and signatures gives opinion in favour of the