The phrase "agreement voluntarily" is correct and usable in written English.
It can be used in contexts where you want to emphasize that an agreement was made without coercion or pressure.
Example: "The parties entered into the agreement voluntarily, ensuring that both sides were fully aware of the terms."
Alternatives: "consensual agreement" or "agreement made freely".
He called the idea that she had signed the arbitration agreement voluntarily "ridiculous," noting that it was a condition of competition.
In addition to being truthful, both parties must enter into the agreement voluntarily.
If Amazon and the Post Office reached an agreement voluntarily, I presume they both gained from it.
But Shapiro explained that the UEP approached the Humane Society for the talks that led to the agreement voluntarily.
Massullo said Lee signed the agreement "voluntarily and intelligently" and called it "striking" that Lee did not attempt to preserve her eggs when her marriage with Findley began to founder.
Mr. Stanley's lawyer, Larry R. Veselka, said his client "entered into these agreements voluntarily".
License agreements voluntarily negotiated at any time between one or more copyright owners of nondramatic musical works and one or more persons entitled to obtain a compulsory license under subsection (a) shall be given effect in lieu of any determination by the Copyright Royalty Judges.
License agreements voluntarily negotiated at any time between 1 or more copyright owners of sound recordings and 1 or more transmitting organizations entitled to obtain a statutory license under this subsection shall be given effect in lieu of any decision by the Librarian of Congress or determination by the Copyright Royalty Judges.
Experts in executive compensation said it was unusual for someone to be paid under a severance agreement for voluntarily leaving to take a top position at another organization.
Officials said the order was issued late Friday after the crew members violated an agreement to voluntarily confine themselves.
All noninstitutionalized individuals who gave their agreement to voluntarily participate in the study were eligible.
