Perhaps most frightening of all, there is no telling how many fakes still lie in plain sight, accepted as originals by experts and the public alike. Famed contemporary forgers such as Wolfgang Beltracchi and Mark Landis, for instance, have infiltrated many museum collections. In 2014, Switzerland’s Fine Art Expert Institute estimated that 50 percent of all work on the market is fake—a figure that was quickly second-guessed, but remains troubling.

In archaeology and paleontology, the derived term provenience is used with a related but very particular meaning, to refer to the location (in modern research, recorded precisely in three dimensions) where an artifact or other ancient item was found.[3] Provenance covers an object's complete documented history. An artifact may thus have both a provenience and a provenance.
^ Tan, Yu Shyang; Ko, Ryan K.L.; Holmes, Geoff (November 2013). "Security and Data Accountability in Distributed Systems: A Provenance Survey". 2013 IEEE 10th International Conference on High Performance Computing and Communications & 2013 IEEE International Conference on Embedded and Ubiquitous Computing. IEEE: 1571–1578. doi:10.1109/hpcc.and.euc.2013.221. ISBN 9780769550886.
In another common form of money laundering, called smurfing (also known as "structuring"), the criminal breaks up large chunks of cash into multiple small deposits, often spreading them over many different accounts, to avoid detection. Money laundering can also be accomplished through the use of currency exchanges, wire transfers, and "mules"—cash smugglers, who sneak large amounts of cash across borders and deposit them in foreign accounts, where money-laundering enforcement is less strict.
During the Renaissance, many painters took on apprentices who studied painting techniques by copying the works and style of the master. As a payment for the training, the master would then sell these works. This practice was generally considered a tribute, not forgery, although some of these copies have later erroneously been attributed to the master.
Financial gain is the most common motive for literary forgery, the one responsible for the numerous forged autographs that appear on the market. The popularity of such authors as the Romantic poets Robert Burns, Percy Bysshe Shelley, and Byron led to the fabrication of numerous forgeries of their autographs, some of which remain in circulation. These forgeries were usually made by men who had access to only one or two genuine specimens, which they began by tracing. Their forgeries are stiff, exaggeratedly uniform, and lacking in the fluency and spontaneity of genuine autographs.

(function(){"use strict";function s(e){return"function"==typeof e||"object"==typeof e&&null!==e}function a(e){return"function"==typeof e}function l(e){X=e}function u(e){G=e}function c(){return function(){r.nextTick(p)}}function f(){var e=0,n=new ne(p),t=document.createTextNode("");return n.observe(t,{characterData:!0}),function(){}}function d(){var e=new MessageChannel;return e.port1.onmessage=p,function(){e.port2.postMessage(0)}}function h(){return function(){setTimeout(p,1)}}function p(){for(var e=0;et.length)&&(n=t.length),n-=e.length;var r=t.indexOf(e,n);return-1!==r&&r===n}),String.prototype.startsWith||(String.prototype.startsWith=function(e,n){return n=n||0,this.substr(n,e.length)===e}),String.prototype.trim||(String.prototype.trim=function(){return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,"")}),String.prototype.includes||(String.prototype.includes=function(e,n){"use strict";return"number"!=typeof n&&(n=0),!(n+e.length>this.length)&&-1!==this.indexOf(e,n)})},"./shared/require-global.js":function(e,n,t){e.exports=t("./shared/require-shim.js")},"./shared/require-shim.js":function(e,n,t){var r=t("./shared/errors.js"),i=(this.window,!1),o=null,s=null,a=new Promise(function(e,n){o=e,s=n}),l=function(e){if(!l.hasModule(e)){var n=new Error('Cannot find module "'+e+'"');throw n.code="MODULE_NOT_FOUND",n}return t("./"+e+".js")};l.loadChunk=function(e){return a.then(function(){return"main"==e?t.e("main").then(function(e){t("./main.js")}.bind(null,t))["catch"](t.oe):"dev"==e?Promise.all([t.e("main"),t.e("dev")]).then(function(e){t("./shared/dev.js")}.bind(null,t))["catch"](t.oe):"internal"==e?Promise.all([t.e("main"),t.e("internal"),t.e("qtext2"),t.e("dev")]).then(function(e){t("./internal.js")}.bind(null,t))["catch"](t.oe):"ads_manager"==e?Promise.all([t.e("main"),t.e("ads_manager")]).then(function(e){t("./ads_manager/main.js")}.bind(null,t))["catch"](t.oe):"publisher_dashboard"==e?t.e("publisher_dashboard").then(function(e){undefined,undefined,undefined,undefined,undefined,undefined,undefined,undefined}.bind(null,t))["catch"](t.oe):"content_widgets"==e?Promise.all([t.e("main"),t.e("content_widgets")]).then(function(e){t("./content_widgets.iframe.js")}.bind(null,t))["catch"](t.oe):void 0})},l.whenReady=function(e,n){Promise.all({return l.loadChunk(e)})).then(function(){n()})},l.installPageProperties=function(e,n){window.Q.settings=e,window.Q.gating=n,i=!0,o()},l.assertPagePropertiesInstalled=function(){i||(s(),r.logJsError("installPageProperties","The install page properties promise was rejected in require-shim."))},l.prefetchAll=function(){t("./settings.js");Promise.all([t.e("main"),t.e("qtext2")]).then(function(){}.bind(null,t))["catch"](t.oe)},l.hasModule=function(e){return!!window.NODE_JS||t.m.hasOwnProperty("./"+e+".js")},l.execAll=function(){var e=Object.keys(t.m);try{for(var n=0;n=c?n():document.fonts.load(u(o,'"''"'),a).then(function(n){1<=n.length?e():setTimeout(t,25)},function(){n()})}t()});var w=new Promise(function(e,n){l=setTimeout(n,c)});Promise.race([w,m]).then(function(){clearTimeout(l),e(o)},function(){n(o)})}else t(function(){function t(){var n;(n=-1!=y&&-1!=g||-1!=y&&-1!=v||-1!=g&&-1!=v)&&((n=y!=g&&y!=v&&g!=v)||(null===f&&(n=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))/.exec(window.navigator.userAgent),f=!!n&&(536>parseInt(n[1],10)||536===parseInt(n[1],10)&&11>=parseInt(n[2],10))),n=f&&(y==b&&g==b&&v==b||y==x&&g==x&&v==x||y==j&&g==j&&v==j)),n=!n),n&&(null!==_.parentNode&&_.parentNode.removeChild(_),clearTimeout(l),e(o))}function d(){if((new Date).getTime()-h>=c)null!==_.parentNode&&_.parentNode.removeChild(_),n(o);else{var e=document.hidden;!0!==e&&void 0!==e||(y=p.a.offsetWidth,g=m.a.offsetWidth,v=w.a.offsetWidth,t()),l=setTimeout(d,50)}}var p=new r(a),m=new r(a),w=new r(a),y=-1,g=-1,v=-1,b=-1,x=-1,j=-1,_=document.createElement("div");_.dir="ltr",i(p,u(o,"sans-serif")),i(m,u(o,"serif")),i(w,u(o,"monospace")),_.appendChild(p.a),_.appendChild(m.a),_.appendChild(w.a),document.body.appendChild(_),b=p.a.offsetWidth,x=m.a.offsetWidth,j=w.a.offsetWidth,d(),s(p,function(e){y=e,t()}),i(p,u(o,'"''",sans-serif')),s(m,function(e){g=e,t()}),i(m,u(o,'"''",serif')),s(w,function(e){v=e,t()}),i(w,u(o,'"''",monospace'))})})},void 0!==e?e.exports=a:(window.FontFaceObserver=a,window.FontFaceObserver.prototype.load=a.prototype.load)}()},"./third_party/tracekit.js":function(e,n){/**
You are responsible for reading, understanding and agreeing to the National Law Review's (NLR’s) and the National Law Forum LLC's  Terms of Use and Privacy Policy before using the National Law Review website. The National Law Review is a free to use, no-log in database of legal and business articles. The content and links on are intended for general information purposes only. Any legal analysis, legislative updates or other content and links should not be construed as legal or professional advice or a substitute for such advice. No attorney-client or confidential relationship is formed by the transmission of information between you and the National Law Review website or any of the law firms, attorneys or other professionals or organizations who include content on the National Law Review website. If you require legal or professional advice, kindly contact an attorney or other suitable professional advisor.  

The fundamental consideration in determining forgery is “intent to deceive.” The act of copying a painting or other work of art is in itself not forgery, nor is the creation of a work “in the style” of a recognized painter, composer, or writer or of a particular historical period. Forgery may be the act not of the creator himself but of the dealer who adds a fraudulent signature or in some way alters the appearance of a painting or manuscript. Restoration of a damaged painting or manuscript, however, is not considered forgery even if the restorer in his work creates a significant part of the total work. Misattributions may result either from honest errors in scholarship—as in the attribution of a work to a well-known artist when the work was in fact done by a painter in his workshop, a pupil, or a later follower—or from a deliberate fraud.
There is no comparable entity in the art market. But were the same type of program instituted in the art market, it would only require that the auction house, dealer or lawyer know the beneficial owner and be able to reveal that information to federal authorities. It would not require the other side of the transaction to learn the seller (or buyer’s) identity.
In the case of photographer Man Ray[25] print production was often poorly managed during his lifetime, and many of his negatives were stolen by people who had access to his studio. The possession of the photo-negatives would allow a forger to print an unlimited number of fake prints, which he could then pass off as original. Fake prints would be nearly indistinguishable from originals, if the same photographic paper was used. Since unused photographic paper has a short (2–5 years) useful life, and the composition of photographic paper was frequently changed, the fakes would have had to be produced not long after the originals.

Of course, beyond AML-related process concerns, any art dealer — just like any business person — always must remember that just about any financial transaction that involves proceeds known to have originated from illegal activity represents a criminal money laundering offense.  Stated otherwise, even if the BSA is not expanded to include dealers in art and antiquities, those in the U.S. art industry still need to bear in mind, in extreme examples, the omnipresent federal criminal code.  Sometimes, the provenance of the funds can be more critical than the provenance of the art.

Further complicating matters, following Man Ray's death, control of printing copyrights fell to his widow, Juliet Man Ray, and her brother, who approved production of a large number of prints that Man Ray himself had earlier rejected. While these reprints are of limited value, the originals, printed during Man Ray's lifetime, have skyrocketed in value, leading many forgers to alter the reprints, so that they appear to be original.
Ultraviolet rays readily reveal additions or alterations to a painting, since the varnish layers and some of the paint layers fluoresce to different colours. Ultraviolet is also used in the examination of marble sculpture. Old marble develops a surface that will fluoresce to a yellow-greenish colour, whereas a modern piece or an old surface recently recut will fluoresce to a bright violet. Infrared rays can penetrate thin paint layers in an oil painting to reveal underpainting that may disclose an earlier painting on the same canvas, or perhaps a signature that has been painted out and covered by a more profitable one. X rays are used to examine the internal structure of an object. A carved wooden Virgin supposedly of the 15th century but revealing modern machine-made nails deep inside is obviously a fraud. A forger usually works for the surface effect and is not concerned with the internal structures.

A tale of literary forgery that came to light in the early 21st century was that of the celebrity biographer Lee Israel, who confessed in her memoir, Can You Ever Forgive Me? (2008), that while down on her luck in the 1990s she had forged and sold to collectors hundreds of letters by various notable figures—Louise Brooks, Noël Coward, Dorothy Parker, Humphrey Bogart, and Lillian Hellman among them.

One of the more-complicated examples is that of the Getty kouros, an allegedly 6th-century-bce male sculpted figure owned by the J. Paul Getty Museum in Los Angeles that has long been suspected of being a modern forgery. The Getty paid a very high price for what it believed may have been the last remaining such figure on the art market only to find that the sculpture had stylistic irregularities that suggested that it could not be authentic. At the same time, scientific tests have not demonstrated that it is of modern origin, and some scholars have argued that stylistic anomalies do not prove that it is a fake. The Getty Villa exhibited the work in its galleries with a label that read: “about 530 bc or modern forgery.” However, the kouros was removed from view when the museum completed a yearlong renovation in 2018, with the director stating that the sculpture was fake.