Can a contractor sign a contract (in this case, to carry out building work), and also witness the same contract? This is in the UK.
Alasdair Taylor's Answer
Where the signatures to a contract need to be witnessed, a party to the contract should not witness his or her own signature, nor the signature of any other party to the contract.
Of course, in many cases under English law a contract will not require signatures to be witnessed for the execution of the contract to be valid.