
Shill bidding is a practice that is illegal in many jurisdictions, including Australia. It involves a seller or their agent placing bids on an item to artificially increase its price, desirability, or search standing. Shill bidding can occur in online or live auctions and is prohibited on platforms like eBay due to its potential for fraud and unfair advantages. The practice may also be considered wire fraud, a federal offense carrying severe penalties. Shill bidding laws vary across states, and in some cases, disclosures or notices are required for proxy purchases.
| Characteristics | Values |
|---|---|
| Shill bidding legality in Australia | Illegal |
| Shill bidding legality in other jurisdictions | Illegal in many places, but legal in some cases |
| Shill bidding on eBay | Prohibited |
| Shill bidding as part of fraud schemes | Yes |
| Penalties for shill bidding | Vary depending on jurisdiction and specifics of the case |
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What You'll Learn
- Shill bidding is illegal in Australia
- Shill bidding is when a seller uses a separate account to artificially raise the price of an auction
- Shill bidding is not allowed on eBay
- Shill bidding may be considered a form of wire fraud, which is a federal offense
- Shill bidding has been used as part of larger fraud schemes

Shill bidding is illegal in Australia
Shill bidding is a practice that predates the internet, where a seller or their agent bids on an item to artificially increase its price, desirability, or search standing. Shill bidding is illegal in Australia and many other countries.
In Australia, shill bidding is considered illegal as it is a form of dummy bidding, which is the practice of bidding to increase the price of an auction without intending to buy the item. Shill bidding can occur when a seller uses a separate account or asks a friend or family member to place bids on their behalf. This creates an artificial bidding war, giving the seller an unfair advantage and potentially causing other bidders to pay more than they should.
Online platforms such as eBay have strict policies prohibiting shill bidding, as it is considered unethical and can lead to a poor shopping experience for buyers. Shill bidding can also be a gateway to more serious fraud schemes, including the sale of counterfeit goods and forgeries.
To avoid shill bidding, bidders can watch their desired item and place a bid just before the auction closes, reducing the opportunity for shill bidders to increase the item's value. Additionally, some jurisdictions require proxy purchases to be disclosed, which can help prevent shill bidding and provide transparency in the bidding process.
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Shill bidding is when a seller uses a separate account to artificially raise the price of an auction
Shill bidding is a practice that predates the internet. It involves a seller using a separate account or an agent to place bids on an item they are selling, with the intention of artificially increasing its price, desirability, or search standing. Shill bidding is illegal in many places, including Australia, and can carry severe penalties. The practice is prohibited by platforms such as eBay, as it creates an unfair advantage for the seller and can result in other bidders paying more than they should. Shill bidding can also be a precursor to larger fraud schemes, including the sale of counterfeit goods.
In some jurisdictions, shill bidding is allowed if a notice is posted in the terms of service. For example, UCC-3-228 of the Uniform Commercial Code permits shill bidding in auctions if disclosed. However, even when allowed, shill bidding is considered unethical. Shill bidding may also be referred to as "dummy bidding" and can be achieved through the use of different computers and Internet servers to conceal the seller's identity.
To avoid shill bidding, bidders can place their bids just a few minutes before the auction's closing time, reducing the opportunity for shill bidders to increase the item's value. Additionally, bidders should be cautious if they notice the same initials or user identification appearing alongside their bid, as this may indicate the presence of shill bidding.
Overall, shill bidding is an illegal and unethical practice that aims to manipulate auction prices to the seller's advantage and can lead to serious legal consequences.
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Shill bidding is not allowed on eBay
Shill bidding is a fraudulent practice that is illegal in many parts of the world, including Australia. It involves someone bidding on an item to artificially increase its price, desirability, or search standing. Shill bidding is unfair to buyers and is prohibited on eBay.
EBay's policies are designed to maintain a fair marketplace for all users and to discourage shill bidding. Shill bidding can occur when a seller uses their own separate account or asks a friend, family member, employee, or acquaintance to bid on their auction to drive up the price. This creates an artificial bidding war, giving the bidder an unfair advantage over other buyers and potentially causing them to pay more than they should.
To prevent shill bidding, eBay has implemented the following guidelines:
- Sellers are not allowed to bid on their own auctions, even if they are unaware that it constitutes shill bidding.
- Sellers with employees must ensure that their workers are aware of and comply with the policy. Employees are prohibited from bidding on their employer's items.
- Friends and family members of the seller are not allowed to bid on the seller's items. However, they can use options like "Buy It Now" that do not involve bidding.
- Sellers are allowed to have multiple eBay accounts, but there should be no interaction between these accounts, especially regarding bids or feedback. Information provided across accounts must be accurate and consistent.
If eBay suspects shill bidding, they may take actions such as removing the listing, issuing a warning, restricting activity, or suspending the account. eBay users who suspect shill bidding on the platform can report it to the company, providing the member's user ID and item number.
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Shill bidding may be considered a form of wire fraud, which is a federal offense
Shill bidding is illegal in many places worldwide, including the United States, where it may be considered wire fraud, a federal offense. Shill bidding involves placing fake bids to artificially inflate auction prices, deceiving buyers and affecting fair market value. This practice violates federal laws prohibiting schemes to defraud via electronic communications.
The key elements of wire fraud include the intent to defraud and the use of interstate wire communications. In the context of shill bidding, the scheme benefits the seller and intends to defraud buyers by inflating bids through fake bids or aliases. This can result in buyers paying more than the fair market value of the item.
The penalties for wire fraud can be severe, including imprisonment of up to two decades and felony charges. In one notable case, the former owner of Mastro Auctions was sentenced to 20 months in federal prison for using shill bids to inflate auction prices.
To avoid criminal liability and ensure compliance with auction regulations, it is essential to consult a legal professional for specific guidance. The legality of shill bidding may vary depending on the country and specific circumstances.
While I cannot provide specific legal advice for Australia, it is important to note that shill bidding is generally considered unethical and illegal in many parts of the world due to its fraudulent nature.
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Shill bidding has been used as part of larger fraud schemes
Shill bidding is a fraudulent activity that involves placing bids on items to artificially increase their price, desirability, or search standing. While the practice of shill bidding is prohibited on platforms like eBay, it has also been used as a part of larger fraud schemes.
In some cases, sellers have employed shill bidding as a component of more extensive fraud schemes, including the sale of forgeries or counterfeit goods presented as legitimate, valuable items. For example, in 2001, the New York Times reported on a bidding ring involving three individuals who used shill bids in 1,100 auctions to deceive art buyers into purchasing what they believed to be rare and valuable paintings.
Shill bidding has also been associated with securities fraud, particularly in the context of cryptocurrencies and NFTs. In one instance, an individual created a bot to mimic the trades of a crypto influencer, purchasing members of the same NFT collections to drive up prices. This scheme resulted in a significant financial loss for the bot's operator, highlighting the potential for substantial negative financial impacts on victims of shill bidding fraud.
Additionally, shill bidding has been linked to other fraudulent activities, such as bid rigging and price fixing, which are prohibited under antitrust laws like the Donnelly Act in New York State. These laws impose severe penalties, including potential prison sentences and substantial fines, for those convicted of engaging in such practices.
The complex and evolving nature of online fraud, including shill bidding, presents significant challenges in detection and prevention. Researchers have proposed various algorithms and software architectures to identify and combat shill bidding in both online and offline auctions. These efforts aim to protect honest auction participants and maintain the integrity of the auction process.
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Frequently asked questions
Shill bidding is when someone bids on an item to artificially increase its price, desirability, or search standing. Shill bidding can happen regardless of whether the bidder knows the seller. Shill bidding is illegal in many places around the world and carries severe penalties.
Shill bidding is illegal in Australia. Shill bidding is considered a form of wire fraud, which is a federal offense under 18 U.S. Code Section 1343. Shill bidding has resulted in criminal prosecutions in New York State under the Donnelly Act, which is an antitrust law prohibiting bid rigging and price fixing.
Penalties for shill bidding vary depending on the jurisdiction and the nature of the charges. Maximum penalties for wire fraud can include up to two decades of imprisonment. When shill bidding is part of a larger scheme involving other crimes such as forgery or the sale of counterfeit goods, the penalties become more serious.
One way to avoid shill bidding is to bid on an item just a few minutes before its closing time, as this takes away the opportunity for shill bidders to increase the value. Additionally, be wary if you see the same initials or user ID bidding up your maximums, as this may be a sign of shill bidding.
No, shill bidding is prohibited on eBay. The eBay terms of service clearly state that shill bidding is not permitted, and it can rise to the level of a criminal offense.


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