The manipulation of offers is an illegal practice within the meaning of criminal law or competition in most developed countries. Depending on the court, it is punishable by fines, imprisonment or both. In Slovakia, bid manipulation is illegal under the EU`s Competition protection and membership law, also Article 101 of the TFUE. The first charges brought by the Cartel Office in Slovakia in 2006 concerned six construction companies that had submitted bids for suspicious units. The fines imposed under this tendering programme amounted to 45 million euros following an initial court decision, an overcompensation and the reintroduction of the original judgment.  In 2007, a Slovak ministry participated in the exclusion declaration of bidders by submitting a request to submit proposals on a ballot table in an official building, but not accessible to the public. As a result, a consulting firm was awarded a contract worth 120 million euros.   The word for receiving bribes after participating in auction manipulation is called “tunelovania” in Slovak.  Bid manipulation is an illegal practice in which competing parties unite to determine the winner of a tendering process.
Bid manipulation is a form of anti-competitive collusion and an act of market manipulation; when bidders coordinate, this undermines the bidding process and can lead to a higher manipulated price than could have resulted from a competitive open market bidding process. The manipulation of offers can harm consumers and taxpayers, who may be forced to bear the costs of rising prices and purchases. Although an offence under Japanese criminal law and Japanese anti-monopoly law, auction manipulation remains a common practice in the Japanese construction industry. In a number of academic studies, both in Japan and the United States, it has proven to be a system that significantly increases the cost of construction projects and in the Japanese public sector, which represents a considerable waste of billions of Japanese yen a year of taxpayers` money. In Canada, “auction manipulation” is a misdemeanor under Section 47 of the Competition Act. Bid manipulation is illegal in the European Union (EU), in accordance with Article 101 of the Treaty on the Functioning of the European Union (TFUE). In 2008, the annual cost to the EU of economic waste resulting directly from cartel bid manipulation was estimated at between EUR 13 and 37 billion.  Supply manipulations appear to be improving across Europe, raising concerns, particularly with regard to excessive spending and special tenders.
These individual offers accounted for 17% of offers in 2006, but 30% nine years later. Rand estimated that the total annual cost of the EU`s offer was $5 billion.  The Association of Carriers of Persons pays a fine of 400,000 DKK for manipulating the offer . . . The Konomisk Forening For Persontransport Business Association has accepted a fine of 400,000 DKK (approximately 53,643) for coordinating bids between its members. The Business Association, konomisk Forening for (…) Events in recent years in liberalized supply sectors have emphasized the relative importance of the public sector, either as a mediator ignoring collusion or as a party that has been most seriously harmed by such practices, as it accounts for a significant share of demand for goods and services in most economies. The regulation adopted in May 2018 by the Hong Kong Competition Commission, which assists public authorities and law enforcement agencies in identifying signs of anti-competitive practices in the market (including large-scale manipulation, market allocation and pricing), illustrates the priorities of the public sector for many such measures.