A suggestion box is a device for obtaining additional comments, questions, and requests. In its most basic and traditional form, it is a receptacle with an opening, not unlike an offering box or voting box. The box is used for collecting slips of paper with input from customers and patrons of a particular organization. Suggestion boxes may also exist internally, within an organization, such as means for garnering employee input.
Variations on this method include paper feedback forms which can be sent via postal mail, such as the "We value your input" or "How was the service today?" cards found in some restaurants; solicitations to provide comments over the telephone, such as a voluntary survey at the end of a transaction with a call center, or even an invitation on a printed store receipt to call and complete a customer satisfaction survey (sometimes offered with a product discount); or the placement of feedback forms on an institution's website.
Including mechanisms for customer comments beyond an ordinary point of service has several benefits. Suggestion boxes provide some degree of detachment (or sometimes, especially with computer-mediated communication, complete anonymity) from the person or service that a customer may be critiquing, and may therefore yield more frank and open feedback, thereby providing greater opportunities for obtaining accurate market research data and improving customer relations. In addition to anonymity SuggestionDrop even provides for confidential replies.