EXHIBIT 99(1) CERTIFICATION OF PERIODIC FINANCIAL REPORT PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002, 18 U.S.C. SECTION 1350 I, David Robson, Chief Executive Officer of CanArgo Energy Corporation, hereby certify that the Quarterly Report on Form 10-Q for the Quarter ended September 30, 2002 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in the periodic report fairly presents, in all material respects, the financial condition and results of operations of CanArgo Energy Corporation. Date: November 14, 2002 /s/ David Robson ---------------------- David Robson Chief Executive Officer