Signed on the dotted line is a common phrase used to indicate the final step in a legal or formal agreement. However, there are numerous synonyms for this phrase that can be used to convey the same meaning. These include phrases such as "sealed the deal," "committed to the contract," "put pen to paper," "affixed our signatures," and "formally endorsed." These alternatives can be particularly useful in a business or legal context, where precision and clarity are important. Regardless of the phrase used, the act of signing on the dotted line indicates a binding commitment to a particular agreement or contract.