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  2. Business letter - Wikipedia

    en.wikipedia.org/wiki/Business_letter

    Business letters can have many types of content, for example to request direct information or action from another party, to order supplies from a supplier, to point out a mistake by the letter's recipient, to reply directly to a request, to apologize for a wrong, or to convey goodwill. A business letter is sometimes useful because it produces a ...

  3. Signature forgery - Wikipedia

    en.wikipedia.org/wiki/Signature_forgery

    One method is the "freehand method", whereby the forger, after careful practice, replicates the signature by freehand. Although a difficult method to perfect, this often produces the most convincing results. [1] In the "trace-over method", the sheet of paper containing the genuine signature is placed on top of the paper where the forgery is ...

  4. PAdES - Wikipedia

    en.wikipedia.org/wiki/PAdES

    PAdES has 4 levels of verification for digital certificate, from the most simple and basic (b-b, indicating a signature was executed with a certificate that was valid on a date) to the most complex (b-LTV) allowing electronically signed documents to remain valid for long periods (long term validity) even if underlying cryptographic algorithms ...

  5. Wikipedia:Signature tutorial - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Signature_tutorial

    Here are some actual signatures contributed by actual editors. Edit this section to see the code for each. Feel free to share your own creation! One per customer, please. If you change your signature, replace your entry instead of adding a second one. (Do not add someone else's signature, no

  6. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    Digital signatures are equivalent to traditional handwritten signatures in many respects, but properly implemented digital signatures are more difficult to forge than the handwritten type. Digital signature schemes, in the sense used here, are cryptographically based, and must be implemented properly to be effective.

  7. Questioned document examination - Wikipedia

    en.wikipedia.org/wiki/Questioned_document...

    For example, a questioned document may be a sheet of paper bearing handwriting or mechanically-produced text such as a ransom note, a forged cheque, or a business contract. It may be material not normally thought of as a "document"; FDEs define the word "document" very broadly, as any material bearing marks, signs, or symbols intended to convey ...

  8. Side letter (contract law) - Wikipedia

    en.wikipedia.org/wiki/Side_letter_(contract_law)

    Side letters may also be used in relation to private fund contracts, for example a particular investor may wish to vary the terms of a limited partnership agreement with respect to that particular investor. An investor might be seeking more favourable terms under the contract or might need the side letter to enter the venture under terms to ...

  9. Signature block - Wikipedia

    en.wikipedia.org/wiki/Signature_block

    An email signature block example, using a female variant of the Alan Smithee pseudonym.. A signature block (often abbreviated as signature, sig block, sig file, .sig, dot sig, siggy, or just sig) is a personalized block of text automatically appended at the bottom of an email message, Usenet article, or forum post.