Bribery is the act of giving or receiving something of value in exchange for some kind of influence or action in return, that the recipient would otherwise not alter. Bribery is defined by Black's Law Dictionary as the offering, giving, receiving, or soliciting of any item of value to influence the actions of an official or other person in charge of a public or legal duty. Essentially, bribery is offering to do something for someone for the expressed purpose of receiving something in exchange. Gifts of money or other items of value which are otherwise available to everyone on an equivalent basis, and not for dishonest purposes, is not bribery. Offering a discount or a refund to all purchasers is a legal rebate and is not bribery. For example, it is legal for an employee of a Public Utilities Commission involved in electric rate regulation to accept a rebate on electric service that reduces their cost for electricity, when the rebate is available to other residential electric customers. Giving the rebate to influence them to look favorably on the electric utility's rate increase applications, however, would be considered bribery.
A bribe is the gift bestowed to influence the recipient's conduct. It may be money, goods, rights in action, property, preferment, privilege, emolument, objects of value, advantage, or merely a promise to induce or influence the action, vote, or influence of a person in an official or public capacity.
Many types of payments or favors can constitute bribes: tip, gift, sop, perk, skim, favor, discount, waived fee/ticket, free food, free ad, free trip, free tickets, sweetheart deal, kickback/payback, funding, inflated sale of an object or property, lucrative contract, donation, campaign contribution, fundraiser, sponsorship/backing, higher paying job, stock options, secret commission, or promotion (rise of position/rank).
One must be careful of differing social and cultural norms when examining bribery. Expectations of when a monetary transaction is appropriate can differ from place to place. Political campaign contributions in the form of cash, for example, are considered criminal acts of bribery in some countries, while in the United States, provided they adhere to election law, are legal. Tipping, for example, is considered bribery in some societies, while in others the two concepts may not be interchangeable.
In some Spanish-speaking countries, bribes are referred to as "mordida" (literally, "bite"). In Arab countries, bribes may be called baksheesh (a tip, gift, or gratuity) or "shay" (literally, "tea"). French-speaking countries often use the expressions "dessous-de-table" ("under-the-table" commissions), "pot-de-vin" (literally, "wine-pot"), or "commission occulte" ("secret commission" or "kickback"). While the last two expressions contain inherently a negative connotation, the expression "dessous-de-table" can be often understood as a commonly accepted business practice. In German, the common term is Schmiergeld ("smoothing money").
The offence may be divided into two great classes: the one, where a person invested with power is induced by payment to use it unjustly; the other, where power is obtained by purchasing the suffrages of those who can impart it. Likewise, the briber might hold a powerful role and control the transaction; or in other cases, a bribe may be effectively extracted from the person paying it, although this is better known as extortion.
The forms that bribery take are numerous. For example, a motorist might bribe a police officer not to issue a ticket for speeding, a citizen seeking paperwork or utility line connections might bribe a functionary for faster service.
Bribery may also take the form of a secret commission, a profit made by an agent, in the course of his employment, without the knowledge of his principal. Euphemisms abound for this (commission, sweetener, kick-back etc.) Bribers and recipients of bribery are likewise numerous although bribers have one common denominator and that is the financial ability to bribe.
According to BBC news U.K, "bribery around the world is estimated at about $1 trillion (£494bn)".
As indicated on the pages devoted to political corruption, efforts have been made in recent years by the international community to encourage countries to dissociate and incriminate as separate offences, active and passive bribery. From a legal point of view, active bribery can be defined for instance as the promising, offering or giving by any person, directly or indirectly, of any undue advantage [to any public official], for himself or herself or for anyone else, for him or her to act or refrain from acting in the exercise of his or her functions. (article 2 of the Criminal Law Convention on Corruption (ETS 173) of the Council of Europe). Passive bribery can be defined as the request or receipt [by any public official], directly or indirectly, of any undue advantage, for himself or herself or for anyone else, or the acceptance of an offer or a promise of such an advantage, to act or refrain from acting in the exercise of his or her functions (article 3 of the Criminal Law Convention on Corruption (ETS 173)).
The reason for this dissociation is to make the early steps (offering, promising, requesting an advantage) of a corrupt deal already an offence and, thus, to give a clear signal (from a criminal policy point of view) that bribery is not acceptable. Besides, such a dissociation makes the prosecution of bribery offences easier since it can be very difficult to prove that two parties (the bribe-giver and the bribe-taker) have formally agreed upon a corrupt deal. Besides, there is often no such formal deal but only a mutual understanding, for instance when it is common knowledge in a municipality that to obtain a building permit one has to pay a "fee" to the decision maker to obtain a favourable decision.
A grey area may exist when payments to smooth transactions are made. United States law is particularly strict in limiting the ability of businesses to pay for the awarding of contracts by foreign governments; however, the Foreign Corrupt Practices Act contains an exception for "grease payments"; very basically, this allows payments to officials in order to obtain the performance of ministerial acts which they are legally required to do, but may delay in the absence of such payment. In some countries, this practice is the norm, often resulting from a developing nation not having the tax structure to pay civil servants an adequate salary. Nevertheless, most economists regard bribery as a bad thing because it encourages rent seeking behaviour. A state where bribery has become a way of life is a kleptocracy.
Recent evidence suggests that the act of bribery can have political consequences- with citizens being asked for bribes becoming less likely to identify with their country, region and/or tribal unit.
The tax status of bribes is an issue for governments since the bribery of government officials impedes the democratic process and may interfere with good government. In some countries, such bribes are considered tax-deductible payments. However, in 1996, in an effort to discourage bribery, the OECD Council recommended that member countries cease to allow the tax-deductibility of bribes to foreign officials. This was followed by the signing of the Anti-Bribery Convention . Since that time, the majority of the OECD countries which are signatories of the convention have revised their tax policies according to this recommendation and some have extended the measures to bribes paid to any official, sending the message that bribery will no longer be tolerated in the operations of the government.
As any monetary benefit received from an illegal activity such as bribery is generally considered part of one's taxable income, however, as its criminal, some governments may refuse to accept it as income as it may mean they are a party to the activity. 
Pharmaceutical corporations may seek to entice doctors to favor prescribing their drugs over others of comparable effectiveness. If the medicine is prescribed heavily, they may seek to reward the individual through gifts. The American Medical Association has published ethical guidelines for gifts from industry which include the tenet that physicians should not accept gifts if they are given in relation to the physician's prescribing practices. Doubtful cases include grants for traveling to medical conventions that double as tourist trips.
Dentists often receive samples of home dental care products such as toothpaste, which are of negligible value; somewhat ironically, dentists in a television commercial will often state that they get these samples but pay to use the sponsor's product.
In countries offering state-subsidized or nationally funded healthcare where medical professionals are underpaid, patients may use bribery to solicit the standard expected level of medical care. For example, in many formerly Communist countries from what used to be the Eastern Bloc it may be customary to offer expensive gifts to doctors and nurses for the delivery of service at any level of medical care in the non-private health sector.
Politicians receive campaign contributions and other payoffs from powerful corporations, organizations or individuals in return for making choices in the interests of those parties, or in anticipation of favorable policy, also referred to as lobbying. This is not illegal in the United States and forms a major part of campaign finance, though it is sometimes referred to as the money loop. Convictions for this form of bribery are easier to obtain with hard evidence, that is a specific amount of money linked to a specific action by the bribed. Such evidence is frequently obtained using undercover agents, since evidence of a quid pro quo relation difficult to prove. See also influence peddling and political corruption. Recent evidence suggests that demands for bribes can adversely impact citizen level of trust and engagement with the political process.
Employees, managers, or salespeople of a business may offer money or gifts to a potential client in exchange for business.
For example, in 2006, German prosecutors conducted a wide-ranging investigation of Siemens AG to determine if Siemens employees paid bribes in exchange for business.
In some cases where the system of law is not well-implemented, bribes may be a way for companies to continue their businesses. In the case, for example, custom officials may harass a certain firm or production plant, officially stating they are checking for irregularities, halting production or stalling other normal activities of a firm. The disruption may cause losses to the firm that exceed the amount of money to pay off the official. Bribing the officials is a common way to deal with this issue in countries where there exists no firm system of reporting these semi-illegal activities. A third party, known as a White Glove, may be involved to act as a clean middleman.
Specialist consultancies have been set up to help multinational companies and small and medium enterprises with a commitment to anti-corruption to trade more ethically and benefit from compliance with the law.
Contracts based on or involving the payment or transfer of bribes ("corruption money", "secret commissions", "pots-de-vin", "kickbacks") are void.
In 2012, The Economist noted:
Bribery would be less of a problem if it wasn't also a solid investment. A new paper by Raghavendra Rau of Cambridge University and Yan Leung Cheung and Aris Stouraitis of the Hong Kong Baptist University examines 166 high-profile cases of bribery since 1971, covering payments made in 52 countries by firms listed on 20 different stockmarkets. Bribery offered an average return of 10 to 11 times the value of the bung paid out to win a contract, measured by the jump in stockmarket value when the contract was won. America's Department of Justice found similarly high returns in cases it has prosecuted.
In addition, a survey conducted by auditing firm Ernst & Young (EY) in 2012 found that 15 percent of top financial executives are willing to pay bribes in order to keep or win business. Another 4 percent said they would be willing to misstate financial performance. This alarming indifference represents a huge risk to their business, given their responsibility.
Referees and scoring judges may be offered money, gifts, or other compensation to guarantee a specific outcome in an athletic or other sports competition. A well-known example of this manner of bribery in the sport would be the 2002 Olympic Winter Games figure skating scandal, where the French judge in the pairs competition voted for the Russian skaters in order to secure an advantage for the French skaters in the ice dancing competition.
Additionally, bribes may be offered by cities in order to secure athletic franchises, or even competitions, as happened with the 2002 Winter Olympics. It is common practice for cities to "bid" against each other with stadiums, tax benefits, and licensing deals.
The U.S. introduced the Foreign Corrupt Practices Act in 1977 to address bribery of foreign officials. The Foreign Corrupt Practices Act, or FCPA, was introduced to prevent the influencing of foreign officials by companies through rewards or payments. This legislation dominated international anti-corruption enforcement until around 2010 when other countries began introducing broader and more robust legislation, notably the United Kingdom Bribery Act 2010. The International Organization for Standardization introduced an international anti-bribery management system standard in 2016. In recent years, cooperation in enforcement action between countries has increased.
Under 18 U.S. Code § 201 - Bribery of public officials and witnesses, the law strictly prohibits any type of promising, giving, or offering of value to a public official. A public official is further defined as anyone who holds public or elected office.  Another stipulation of the law in place condemns the same kind of offering, giving, or coercing a witness in a legal case to changing their story.  The minimum penalty for either of these offenses is 10 years, and a potential fine. 
Programs of prevention need to be properly designed and meet with international standards of best practice. To ensure respect for a program, whether it be on the part of employees or business partners, external verification is necessary. International best practices such as the Council for Further Combating Bribery of Foreign Public Officials in International Business Transactions, Annex 2; the ISO 26000 norm (section 6.6.3) or TI Business Principles for Countering Bribery are used in external verification processes to measure and ensure that a program of bribery prevention works and is consistent with international standards. Another reason for businesses to undergo external verification of their bribery prevention programs is that it means evidence can be provided to assert that all that was possible was done to prevent corruption. Companies are unable to guarantee corruption has never occurred; what they can do is provide evidence that they did their best to prevent it.
There is no federal statute under the U.S Law that prohibits or regulates any type of private or commercial bribery. There is a way for prosecutors to try people for bribery by using existing laws. Section 1346 of Title 18 can be used by prosecutors, to try people for 'a scheme or artifice to deprive another of the intangible right to honest services,' under the mail and wire fraud statutes.  Prosecutors have always successfully prosecuted private company employees fro breaching a fiduciary duty and taking bribes, under Honest services fraud.
There are also cases of successful prosecution of bribery in the case of international business. The DOJ has used the Travel Act, 18 USC Section 1952 to prosecute bribery. Under the Travel Act, it is against the law, domestically and internationally, to utilize'the mail or any facility in interstate or foreign commerce' with intent to 'promote, manage, establish, carry on, or facilitate the promotion, management, establishment or carrying on, of any unlawful activity'.