The bid rigging schemes listed below are linked to corruption, as corrupt parties often seek to rig the bidding process to favor the corrupt payer and to exclude other legitimate bidders. As such, bid rigging schemes are both red flags of corruption and evidence of corrupt influence. Click on each scheme for more information.
In some cases, corrupt project officials will not tamper with the selection process by the methods listed below, and will select what they believe to be the best bid or proposal. They will then demand a bribe from the selected firm before they will sign a contract. In this case the price of the bids or proposals may rise, but the other red flags of bid rigging will be largely absent.