To ensure that a treaty is legally binding, it must only be signed in any UK jurisdiction “in the form of an act, in the presence of. and delivered … ” be an act. It simply requires these words and the signature of the person doing the deed, as well as a witness signature and details: name, address, profession. Signatures should appear on the document itself in a field provided for this purpose and the full names of signatories should be printed on it. 4. A document signed pursuant to paragraph 2 and executed by the company, in any form whatsoever, shall have the same effect as if it were executed under the common seal of the company. (b) it is actually performed as an instrument by that person or, as the case may be, by one or more of those parties. Instrument-by-instrument agreements do not require a counterpart for them to be legally binding.