I could have behaved with the first sentence, but I wanted to make sure that anyone who uses that language feels comfortable when the phrase is used for the date of this agreement, even if no date is included in the introductory sentence. (One day, I`ll soon be blogging about the excessive use of the set validity date.) There are some interesting legal points that arise from the possibility of having a demoted effective date. The date next to a signature should always be the date on which the party signed the document. This Agreement shall take effect when all the Parties have signed it. The date on which this Agreement was signed by the last Party (as indicated by the date indicated at the address [or below] of that Party`s signature) shall be deemed to be the date of this Agreement. In this blog post, I described how, in certain circumstances, you want to date a contract by letting the parties date their signatures instead of inserting a date in the introductory clause. In this case, the parties may, from the date of provision of the contract, assert the reimbursed rights that began on the defined expiry date. It is important to remember that the return of the defined validity date is not the same as the return of the contract itself. The retrodating of a contract may constitute a criminal offence and constitutes a violation of the rules of professional conduct for lawyers. Often, a contract (as explained above) is entered into and dated to the date of the last signature, but contains another defined “effective date” that indicates when some or all of the parties` obligations must begin….