"obtain affirmation" is a correct and usable phrase in written English.
You can use it when you want to confirm something or receive confirmation of something. For example, "I decided to obtain affirmation from the court before I took any further action."
He argued nine cases before the Supreme Court, including United States v. Penn-Olin in 1964, a case in which he obtained an affirmation of a lower-court ruling that allowed a joint venture between two large companies that were potential competitors, the Pennwalt Corporation and the Olin Mathieson Chemical Corporation.
Doctors must also obtain the written affirmation of a second, independent physician that the case meets the requirements and report all such deaths to the authorities for review.
Obtain an Affirmation of Freedom to Marry from the respective embassy or consulate in Bangkok.
Mr. Davies told Lord Hutton, the judge leading the inquiry, that he had summoned the BBC's board of governors to an emergency meeting last month and obtained from them an affirmation that proper journalistic procedures had been followed in producing the Gilligan report.
The second goal is obtaining an unambiguous UN affirmation of the Palestinian right to national self-determination.
A printed consent form was translated by a trained investigator into the local language and read to the study participant, and the participant's signature, index fingerprint, or witnessed verbal affirmation was obtained as indication of consent to participate.
To estimate the degree of similarity between the implanted and obtained triclusters, we define affirmation score in the same way as Prelic et. al. defined for two sets of biclusters [ 6, 8].
First, the lack of a firm foundation and affirmation for research ethics might impact negatively on the ability of investigators to obtain internationally funded research.
The United States appealed to the Security Council (which the Soviets were boycotting for its continued seating of Nationalist China) and obtained a condemnation of North Korea and an affirmation of collective security.
"With a few clicks and an affirmation that the subject is believed to be engaged in terrorism, espionage or nuclear proliferation, an analyst obtains full access to Facebook's 'extensive search and surveillance capabilities against the variety of online social networking services,'" explains The Post.
