A: The common cause of bidders who do not meet the following circumstances cause tender invalid 1, in addition to the implementation of a total split decision was the sale outside the auction, bidders for the owner of the subject of the auction. 2, bidders have not paid the price of gold and beat until a given person or endure another auction. 3 bidders or their legal representatives, or agents appointed not made identity document or with special agency of the commission, the executive member in the public auction target discovery read before tenders were not yet corrected. 4, bidders minors, by their legal representatives did not bid. 5, when the subject of arable land auction, tender private person without the permission of the competent authority documents attached to the tender, the executive member in the public auction target discovery read before tenders were not yet corrected. 6, bidders foreigners, not the immovable property is located city and county governments have approved the purchase of immovable property documents attached to the tender, the executive member in the public auction target discovery read before tenders were not yet corrected. 7, subject to aboriginal reserve auction, the bidder is not the documents attached to the proposals of the indigenous, the executive member in the public auction target discovery read before tenders were not yet corrected.