Customer to customer (C2C or consumer to consumer) markets provide a way to allow customers to interact with each other. Traditional markets require business to customer relationships, in which a customer goes to the business in order to purchase a product or service.

Consumer organizations are advocacy groups that seek to protect people from corporate abuse like unsafe products, predatory lending, false advertising, astroturfing and pollution.

n. almost all states and the federal government have enacted laws and set up agencies to protect the consumer (the retail purchasers of goods and services) from inferior, adulterated, hazardous or deceptively advertised products, and deceptive or fraudulent sales practices. Federal statutes and regulations govern mail fraud, wholesome poultry and meat, misbranding and adulteration of food and cosmetics, truth in lending, false advertising, the soundness of banks, securities sales, standards of housing materials, flammable fabrics, and various business practices. The Magnuson-Moss Act (1973) sets minimum standards for product warranties, makes a company that financed the sale responsible for product defects, and creates liability (financial responsibility) for "implied" warranties (when the circumstances show that a warranty of lack of defects was intended) as well as express (specific) warranties. Mail fraud may include fake contests, "low-ball" price traps (bait and switch), supposed credit for referrals of your friends, phoney home improvement loans with huge final payments, and swamp land sales. Some states' laws regulate and give some protection against high-pressure door-to-door sales, false labeling, unsolicited merchandise, abusive collection practices, misleading advertising and referral and promotional sales. Almost all states have agencies set up to actively protect the consumer. See also: bait and switch fraud implied warranty product liability securities

Consumer IR, consumer infrared, or CIR is a class of devices employing the infrared portion of the electromagnetic spectrum for wireless communications. CIR ports are commonly found in consumer electronics devices such as television remote controls, PDAs, laptops, and computers.

Consumer protection is the practice of safeguarding buyers of goods and services, and the public, against unfair practices in the marketplace. Consumer protection measures are often established by law.

The theory of consumer choice is the branch of microeconomics that relates preferences to consumption expenditures and to consumer demand curves. It analyzes how consumers maximize the desirability of their consumption as measured by their preferences subject to limitations on their expenditures, by maximizing utility subject to a consumer budget constraint.

The Consumer Action Law Centre (CALC), also known as Consumer Action, is primarily a campaign-focused consumer advocacy organisation, but also acts as a community legal centre, providing free legal advice and pursuing litigation on behalf of vulnerable and disadvantaged consumers across Victoria, Australia. Based in Melbourne, it was formed in 2006 by the merger of the Consumer Law Centre Victoria and the Consumer Credit Legal Service and is funded jointly by Victoria Legal Aid and Consumer Affairs Victoria.

Business to Customer