Methods and systems for forgery detection

A writable document forgery detection system comprising:

• a data receiver;
• an updatable data repository functionally coupled to the data receiver;
• a computing device operatively coupled to the data receiver and to the updatable data repository and comprising a memory;
• the memory storing instructions that, when executed by the processor, perform a set of operations comprising:
• receiving, at the data receiver, a writable document comprising a plurality of fields, each field being configured to receive a handwritten segment;
• extracting, via the computing device, a first handwritten segment from another field of the plurality of fields of the writable document, wherein the first handwritten segment comprises a plurality of first pixels;
• extracting, via the computing device, a second handwritten segment, the second handwritten segment comprising a plurality of second pixels;
• assigning, via the computing device, to each first pixel and to each second pixel a likelihood of belonging to a handwritten segment, the likelihood of belonging to the handwritten segment comprising a fractional value;
• comparing, via the computing device, the first handwritten segment to the second handwritten segment based on the assigned likelihood of each first pixel and each second pixel;
• and
• assigning, via the computing device, a likelihood of the first handwritten segment and the second handwritten segment being from a same writer based on the comparison;
• wherein:
• the first handwritten segment comprises a first one of a payor signature in a payor signature field, a payee name in a payee name field, a spelled amount in a first amount field, an amount written as a number in a second amount field, and a date written in a date field;
• and
• the second handwritten segment comprises a second one of the payor signature in the payor signature field, the payee name in the payee name field, the spelled amount in the first amount field, the amount written as a number in the second amount field, and the date written in the date field, the second one being different from the first one.