Caveat emptor effect that the initial transfer or license of intellectual-property rights is preserved. Most stores require proof of purchase and impose time limits on exchanges or refunds. Some larger chain stores, such as F.Y.E., Staples, Target, or Walmart, will, however, do exchanges or refunds at any time, with or without proof of purchase, although they usually require a form of picture identification and place per-transaction and/or per-person quantity or dollar limitations on such returns. In the UK, consumer law has moved away from the "caveat emptor" model, with laws passed that have enhanced consumer rights and allow greater leeway to return
Caveat emptor insist on an "even exchange" for other, "conforming" instances of the product. When conforming goods are not available in stock but are available for the dealer to purchase (usually on the open or "spot" market), the buyer may require that the seller obtain the goods elsewhere, even at a higher price, with the seller having to incur a loss equivalent to the price difference. If the vendor still does not or cannot provide the goods and the dispute proceeds to litigation (as opposed to renegotiation or settlement), then as in all cases of vendor breaches of contract, the buyer may