In order to prove the pronote and receipt in question, plaintiff Ranbir Singh appeared in the witness box as P.W.1 and also examined Balbir Singh (P.W.2), who is one of the attesting witnesses of the receipt (Exhibit P.2), the other attesting witness being Jaswinder Singh. The plaintiff-respondent also proved on record sale deed (Exhibit P.15), which was having admitted signatures of defendantappellant Teja Singh. The signatures of Teja Singh on sale deed (Exhibit P.15) were got compared his signatures on the pronote (Exhibit P.1) and receipt (Exhibit P.2) by the respondent from R.V. Vashishat, Documents Expert (P.W.3). R.V. Vashishat (P.W.3), vide his report (Exhibit P.3) opined that the admitted signatures of Teja Singh (appellant) on sale deed (Exhibit P.15) tallied with his disputed signatures on pronote (Exhibit P.1) and receipt (Exhibit P.2) and that signatures on sale deed (Exhibit P.15) and on pronote (Exhibit P.1) and receipt (Exhibit P.2) were of one and the same person. The evidence furnished by R.V. Vashishat, Documents Expert (P.W.3), which is a clinching one, was not rebutted by the appellant at any stage by examining any expert witness. In the presence of this evidence, both the Courts below were justified in holding that the appellant had borrowed a sum of Rs.3,70,000/- from the respondent on 12.12.2000 and had executed pronote (Exhibit P.1) and receipt (Exhibit P.2) in favour of the respondent. It may also be mentioned here that in the suit filed by the appellant against M/s. Guru Trading Company for rendition of accounts, no plea had been raised by him (appellant) that his signatures had been obtained by the said concern on blank proforma