Duly signed meaning

"Duly signed" refers to a document, contract, or agreement that has been signed in accordance with the required procedures or formalities. In other words, it means that the signature on the document has been given by the appropriate person or party in a legally binding manner. The term "duly" means "properly" or "in the appropriate manner," so when something is "duly signed," it has been signed in the appropriate manner or with the necessary formalities.