The phrase "voluntarily added" is grammatically correct and can be used in written English.
It is used to describe something that was included or inserted on purpose, without being forced or obligated to do so. Example: The students were given the option to voluntarily add extra credit projects to their assignments. In this sentence, "voluntarily added" is used to indicate that the students were not required to add the extra credit projects, but chose to do so of their own free will.
EcoMedia "voluntarily added language in our EcoAds logo to underscore that the program consists of ads funding environmental projects," Ms. Jacobs said, referring to a redesign of the logo.
White residents complained of shops that had signs only in Korean, until nearly all the new merchants voluntarily added English translations.
(AP) NORTH STONINGTON: INDIANS JOIN SUIT An Indian group in the final stage of federal recognition has voluntarily added itself as a defendant in a lawsuit that was filed by Attorney General Richard Blumenthal last month.
While the construction of 22 River Terrace began before the new guidelines were in place, Timothy S. Carey, the authority's president, said that Rockrose, "to its credit," had voluntarily added green elements in its building.
The Chelsea manager has voluntarily added to his list of problems - two wins in eight league games, player unrest over 'lax' training sessions, etc and so on - by dropping Didier Drogba from the squad for the FA Cup replay.
In the last 15 years, over 130 private and community land owners voluntarily added over six million acres of real estate in Kenya's protected areas, providing safe haven for some of the most endangered species including rhino, cheetah, lion, wild dogs and elephants, and critically endangered habitats.
It's a bold politician who voluntarily adds "dog-murderer" to their record.
The concept of the "challenge run" – where players voluntarily add constraints to their playthroughs – is increasingly popular.
Though New York officials hoped that those companies might voluntarily add some accessible cabs, that did not happen.
But during the past decade, as ship operators raced to build bigger ships to supply a growing consumer demand, they chose not to voluntarily add backup systems to new vessels.
Commonplace on social media and personal blogs, especially progressive communities on Tumblr, trigger warnings have begun finding their way into academia: some professors are voluntarily adding trigger warnings to their syllabuses, giving trauma survivors a chance to prepare emotionally before class.
