The purpose of the CISG is to provide a modern, uniform and fair regime for contracts for the international sale of goods. The CISG, which deals with both contract formation and the obligations of the parties, carefully balances the interests of the buyer and seller.Exercise the first renewal option on. U.N. Convention for the International Sale of Goods. Count I is a claim for "Breach of Contract under the United Nations Convention on Contracts for the International Sale of Goods. Vendors and suppliers interested in doing business with Allegheny County can review open solicitations for Purchasing and Supplies bids on the Bonfire website. Country selection and Free Trade Agreements. Ways to enter a country. If your firm did not purchase this product, please fill out page 1, print, sign, and submit a scanned copy to the Commission. Specific requirements are identified in the AHN Vendor Visitation policy.