The E-Sign Act 2000 authorizes the use of electronic registrations in consumer contracts as long as the consumer has “agreed yes” to its use. It says that any law that has a signature obligation can be met by an electronic signature and that electronic agreements can be presented in evidence in court. The absence of a counter-clause does not in itself invalidate any agreement that the parties execute through separate counterparties. However, a counter-clause may help prevent a party from arguing that an agreement is not binding because there is not a copy signed by all parties or because they did not know that they are entering into a binding contract by signing an agreement that was not signed by the other parties. If you sign a private contract between two parties, you can agree on the types of acceptable signatures. Make this contract in writing so that you can bring it to justice if necessary. If your contract or agreement is to be registered with a court, you will probably need to have original signed documents as consideration. As a general rule, a counter-clause would be: “This agreement can be executed in any number of counterparties, each, when executed and delivered, represents an original double, but all the considerations combined constitute a single agreement.” In contract law, the term “counterparty” is used to refer to a copy of a contract (ejemplar of a contracto) that can be considered one of the originals of the document. Each contracting party clearly wants its own “copy” of the agreement (in the sense of ejemplar), which is considered original. In this sense, there are often clauses in the contracts that state that “this agreement can be executed in one or more counterparties, each of which must be original and which together form the same document” or “This contract is executed in double counterparties, each with the strength and effect of an original.” Counter-parties are often used to facilitate the performance of the contract if not all parties can be physically present at the signing.