The phrase "deemed illegitimate" is correct and usable in written English.
It can be used in contexts where something is considered not valid or not recognized as legitimate.
Example: "The contract was deemed illegitimate due to the lack of signatures from both parties."
Alternatives: "considered invalid" or "regarded as unauthorized."
The pope has reportedly agreed to accept seven bishops appointed by Beijing that the church had previously deemed illegitimate.
However, it is not just research in abortion that is deemed "illegitimate;" research in infertility and in vitro fertilization is as well.
Once an elected government is deemed illegitimate, in whatever sense, normal democratic politics, with its give and take, is difficult to sustain.
This weekend, the people of Crimea will vote in a hastily arranged referendum that both the government in Kiev and the international community have deemed illegitimate.
Lawyers for the Senate Democrats were in court arguing that the move by Republicans to regain control of the chamber should be stopped and deemed illegitimate.
Historically, it was important for women to have husbands who acknowledged paternity for their children, as children born to unmarried parents were deemed "illegitimate" and had fewer rights than children born to married parents.
In Miami, some exiles have rejected Mr. Paya for working within a system they deem illegitimate.
The scale and nature of the killings drove a deeper wedge between Mr. Morsi's Islamist backers and their opponents, and diminished the chances that his allies in the Muslim Brotherhood might soon be coaxed back into a political process that they deem illegitimate after the military overthrew the elected president.
Imposed order, says Seidman, "depends on having power over people and formal authority to coerce allegiance and compel obedience," but both are much harder to sustain today in an age of increasingly empowered, informed and connected citizens and employees who can easily connect and collaborate to cast off authority they deem illegitimate.
That means they often refuse to carry proper ID, or pay taxes, which they deem illegitimate – if not unholy.
Relations have soured this year between the US and Hamid Karzai's government, which many Afghans deem illegitimate after his disputed reelection last fall, but whose support and leadership is indispensable to the NATO mission's success.
