make formal

See: formalize
References in periodicals archive ?
Did President Trump or any White House officials make formal or informal inquiries encouraging the Department of Justice to oppose the AT&T and Time Warner merger?
If I fail to pay in 28 days or make formal representations, the penalty will increase to pounds 180.
Union leaders expect Texan investors to be ready to make formal offers in the next two weeks for the bankrupt Mexican Airline Transportes Aereos Ejecutivos once the airlines' value has been established reported El Financiero/Infolatina.