validation ordervalidation order: in insolvency law; an order of the court e...: in insolvency law; an order of the court enabling a company to carry on normal trading via its bank account despite the presentation of a winding up petitionwinding up petition: a legal document by which a court is fo...; where a winding up petitionwinding up petition: a legal document by which a court is fo... has been presented in respect of a company, the company’s bankers, upon learning of the petition, will cease operation of the company’s bank account; the company can however apply to the court for a validation ordervalidation order: in insolvency law; an order of the court e... which, when served on the bank, will usually result in the account being put back into operation, thus allowing normal trading to resume.