17.3 Submission of additional work claims must be supported by a complete set of measurements and other necessary documents such as AI, EI, Contract drawings, As-built drawings, Certified day work sheet, quotation, cost break-down, certification of work done by our authorized representative and etc. [27] Several key points were made by the appellant on the reading and construction of the Letter of Award, in particular on clause 13.2, valuation of progress claims and the preparation of the Final Account. 11 [28] First, the witnesses called by both parties testified that there were valuations of the progress claims submitted because the claims were provisional and the final amount payable was subject to change during the final joint site measurement where the actual work done and materials supplied would be physically ascertained on site. See testimonies of SP 1, SP 2 and SP 3, that the amounts mentioned in the Letter of Award are only provisional and subject to measurement on site. Thus, the value and actual work done by the respondent was still a matter of measurement ascertained at site through the conduct of joint measurements. [29] Second, the total sum of RM2,081,897.92 that was paid for Progress Claims Nos. 1 to 26 were all in accordance with this agreed procedure. [30] Third, that despite being notified orally, as was the practice at site, the respondent failed to attend some of these valuation inspections. At the trial, there was evidence produced showing that a total of 24 site valuations were conducted for the 26 Progress Claims received by the appellant. Of these, 16 were undertaken jointly by both parties whereas 8 were undertaken in the absence of the respondent. [31] Neither of these key points nor even the terms and conditions of the Letter of Award were considered by the learned Judge. Had that been undertaken, the learned Judge would have found, as we have, that the respondent’s case was not proved, even on a balance of probabilities. [32] In relation to the Final Account, the respondent has questioned its authenticity, suggesting that it was created only after the respondent’s claim 12 was filed on 16.11.2010; that it surfaced 4 years after the works had been completed and PC 27 had been submitted. It was suggested that it was therefore not a contemporaneous document, unlike PC 27, and that as a unilateral document created after the respondent’s claim was filed, has no probative value, was totally unreliable and was rightly disregarded by the learned Judge. The Final Account is referred to as Certificate 25 dated 4.1.2011 in the respondent’s submissions. [33] The learned Judge had agreed with the respondent and had found that because the appellant had not responded at the material time to PC 27 and also to the respondent’s letter dated 2.3.2007 [exhibit P31] that the appellant was estopped from challenging the respondent’s claim. [34] Once again, with respect, we must disagree with the learned Judge. The respondent’s line of submission is unsustainable given the following. In terms of chronological sequence, the parties had in fact embarked on a joint site measurement for the purpose of measuring the actual value and quantity of the respondent’s final works prior to the respondent’s letter of 4.1.2007. This exercise of conducting joint site measurement and preparing the Final Account actually took place on 30.8.2006. [35] This Final Account prepared by SD6 was carried out according to the agreed terms and conditions of the Letter of Award. For the purpose of preparing a Final Account, a final valuation had to be conducted and evidence was led to show that this was started on 30.8.2006. The appellant’s representative, Kelvin Lim Chin Kooi [SD6] and the respondent’s representative, Zahirrudin bin Zainal Abidin [Zahir] took part in this exercise; 13 this is evidenced by their signed working sheets prepared for this purpose – see pages 2296 to 2304 of the Record of Appeal and exhibit D52. [36] Zahir, however, did not subsequently attend and complete that final joint site measurement. SD6 testified that Zahir had told him that the respondent’s management did not want Zahir to proceed with the final joint site measurement process. So, SD6 went ahead with and completed on his own, the final joint site measurement. SD6 then went on to prepare the Final Account [exhibit D50] in 2008, based on this measurement. [37] In such circumstances, clause 13.2 of the letter of award entitles the appellant to conduct a unilateral site inspection leading to its certification of the relevant progress claim; and that the valuation so conducted is agreed “shall be deemed final”. This then renders the respondent’s PC 27 questionable and lacking in credibility. [38] As for the contents of the Final Account [exhibit D50], it must therefore be treated as the only evidence of the actual work done and materials installed on site. According to the Final Account, the total work done by the respondent, that is, for the supply of labour, material, machinery and tools for the complete installation of the following works in accordance with specification of main contract and subject to the satisfaction of Jabatan Kerja Raya, was in the sum of RM2,968,025.28. As for the total work done for the Variation Orders, the appellant had certified that the amount payable to the respondent was in the sum of RM228,479.23. The appellant had provided the breakdown of the actual work done and materials installed on site in respect of the respondent’s subcontract works and the variation orders 14 together with the requisite as-built drawings – see pages 2221 to 2291 of the Record of Appeal Vol. 2/11. [39] Further, the Final Account states that only a sum of RM55,115.00 is due to the respondent. This sum was arrived at after taking into account the appellant’s purchase of materials for the respondent and which were reflected in the debit notes tendered at trial. Those debit notes were accepted by the learned Judge and there is no appeal by the respondent on this aspect. [40] SD6 had testified that the Final Account was sent to the respondent for signing. Zahir refused to sign the Final Account. In 2009, when SD6 followed up with the respondent’s signing of the Final Account, he was asked by the respondent to email the same. The emails dated 11.1.2010,