The phrase "admitted membership" is correct and usable in written English.
It can be used in contexts where someone acknowledges or confirms their membership in a group or organization.
Example: "After much consideration, she finally accepted her admitted membership in the exclusive club."
Alternatives: "acknowledged membership" or "confirmed membership".
Admitting membership in Al Qaeda, Richard C. Reid pleaded guilty today to charges of trying to blow up a trans-Atlantic flight in December with explosives hidden in his shoes.
Whenever a suspected member came through, he was taken into a tent with a video camera, asked to sign a statement admitting membership and offered a choice: to stay on one side or the other -- the valley or Kosovo.
Implausible as it may seem that an IRA gunman would so readily admit membership of the organisation, and shooting a soldier because he wanted to get the matter off his chest, the jury was clearly unimpressed by a defendant who complained that he had confessed because water had been splashed over his face.
Aliev doesn't know it, because like most of the other defendants he is not represented by legal counsel, but simply admitting membership in Hizb-ut-Tahrir is tantamount to treason in Uzbekistan, as the fundamentalist Islamic movement seeks to replace the secular state with the Caliphate, or religious rule.
An organization is said to "discriminate invidiously if it arbitrarily excludes from membership" on the basis of such factors "persons who would otherwise be admitted to membership," it says.
She bought her seat on the exchange in 1967, but to her immense anger she remained the only woman admitted to membership for almost a decade.
When the new state of Israel was admitted to membership in the UN in 1949, Eban became its permanent representative and served in that post until 1959.
Another suspect, a woman named Katia, has admitted to membership in the far-right Revolutionary Nationalist Youth (J.N.R ., part of the ultranationalist "Troisième Voie" or "Third Way" movement.
A step in this direction was Philip's intervention now to end the Sacred War, in recognition of which he was admitted to membership of the Delphic Amphictyony an association of neighbouring states.
