Originally, a single wax seal was accepted as a seal by the courts, but in the 19th century, many jurisdictions had relaxed the definition of the inscription of a print in the paper on which the instrument was printed, a paper moulding attached to an instrument, a scroll with a pencil or the words “Seal” or “L.S.” (the Latin term for Locus Seals , which means “place of the seal”). In the law, a seal affixed to a treaty or other legal instrument has, at different times, a special legal significance in the legal orders that recognize it. In the Common Law courts, a sealed contract (“sealed” and other written contracts (concluded under control) was treated differently, although in most of these jurisdictions the practice was gradually disgraced in the 19th and early 20th centuries. The legal concept of seal arises from the wax seal used in the course of history for authentication (among other things). The act (or act under seal or act in solemn form) is a private legal act, characteristic of common law systems, which meets a number of formal requirements, including written form. Despite their lesser importance, seals are still used on contracts, most often on paper. A contract may also be entered into in the form of an act, although consideration is not required. In this case, we are talking about specialty (or contract by contract or contract under seal), as opposed to the single contract (or parol or informal contract) which is oral or written, without any special formalities. On the other hand, many of the transactions that are made in the form of deeds would be considered unilateral contracts in civil regimes, while the common law rules, for lack of consideration, would not classify them in the category of the treaty.
The act has some similarities to the notarial or typical act of civil law, which is why the term is sometimes translated into Italian, even by some dictionaries, by “act” or “notarial act”. Indeed, the two figures can only be distinguished because the act must be drawn up by a notary, while the intervention of a notary or other discipline, with public functions for the validity of the facts, is not necessary, which is therefore similar to a private writing, although subject to special formalities. This does not exclude that a notary is otherwise different from the notary CD. Latin civil law countries may be invited to produce the document (but not in most of the United States and Canada), to sign it as a witness, or to authenticate the signatures affixed, or to have the latter formalities required by law. Indeed, it may be a unilateral legal act signed by a single party (act), or bilateral or plurilateral, signed by two or more parties who make reciprocal transfers and now assume the role of the transderen author, now the role of the receiving party. In the latter case, we are talking about inlays, because they were once used to create more originals of the act on a single sheet, and then to separate them by cutting the sheet itself along a buried or undulating line, so that, by crossing the shutters, the common origin could occur.