84 Sri Lanka Law Reports 1200012 S ri LR. dated 09. 11.1995 marked P3, and the letter dated 01. 11. 1995 marked P4, written by the Ministry of Health to the 1st respondent’s partnership i.e. Senaratne Dental Supplies, intimating the approval of the tender. ii. 1st respondent’s partnership i.e. Senaratne Dental Supplies, as the registered supplier of “Osu Sala" has supplied dental products to the Sri Lanka Air Force. In support the petitioner has produced the following documents which are true copies of the originals i.e. a letter dated 06. 12. 1995 marked P6, written by the 1st respondent as Managing Partner to the Manager "Osu Sala” giving the quotations for the supply of dental products. Order form dated 28. 12.1995 marked P7, made by Sri Lanka Air Force to “Osu Sala” for the purpose of purchasing dental products from "Osu Sala". 1st respondent’s partnership Senaratne Dental Supplies in turn has sold and delivered the said items referred to in P7, to “Osu Sala” (to be supplied to Air Force) on invoices bearing Nos. 5803, 5804, 5805 dated 02. 01.1996 marked P8, P9 and P10 respectively. Two credit sale invoices dated 04. 01. 1996 in respect of the said items issued by “Osu Sala” to the Sri Lanka Air Force have been marked as P 11 and P12 respectively. iii. 1st respondent’s partnership Senaratne Dental Supplies has entered into several contracts with the Sri Lanka Navy for the supply of dental material and it continues as a supplier to the Sri Lanka Navy. In support the petitioner has produced the following documents. A true copy of the invoice No. 6436 dated 13. 09. 1996 issued by the 1st respondent’s partnership for the supply of certain items to the Sri Lanka Navy marked P I 3, iv. A true copy of invoice No. 6449 dated 19. 11. 1996 issued by the 1st respondent’s partnership for the supply of certain items to the Sri Lanka Navy marked P I 4,