"consent by" is correct and usable in written English
You can use it when you need to refer to a consent or agreement that is given by someone. For example: "He gave his consent by signing the form."
Unanimous consent by committee members was required.
Terror And Consent, by Philip Bobbitt.
According to LaTulippe's lawyers, LaTulippe's credit card was used without his consent by a team captain.
Their surveillance might not limit to people who have "given consent" by signing up to Facebook.
The Age of Consent by George Monbiot 288pp, Flamingo, £15.99 This is an extremely important book.
In the United States the Senate must consent by a two-thirds vote.
All about the works of Barrie which were pirated & published without his consent by publishers.
tl dr: Consent by default is not consent.
Patients were recruited with prior informed consent by the authors.
This study was approved for waiver of consent by the Conjoint Ethics Boards.
I had been catcalled and verbally harassed before, but never touched sexually without my consent by a stranger.
