"identity declaration" is correct and usable in written English.
You can use "identity declaration" when you are referring to a document or process used to declare or confirm someone's identity. For example, "In order to obtain a passport, I had to fill out an identity declaration."
But over the years it has become something far bigger: an identity statement, a declaration of Texas swagger — from barrooms to sports arenas to political conventions.
Since the campaign's inception in 1986, the phrase has become "an identity statement, a declaration of Texas swagger".
They instinctively drew on a mixture of "identity" claims (deliberate declarations of how we'd like to be perceived such as a framed university certificate or photograph with a celebrity) to "behavioural residue", the aspects of personality we inadvertently reveal through our homes; for example a chaotic kitchen or a shoe rack organised in ascending colours.
Police contacted a number of postal voters and discovered that Hussain's supporters had collected blank ballot papers and the declaration of identity form.
This was, he explained, a statement of defiance, not a declaration of identity, but it hardly quelled the curiosity about his personal life.
Electors were sent ballot papers and a "declaration of identity" to confirm they had the right to vote, which had to be signed in the presence of and by a witness.
In works based on Ralph Ellison's "Invisible Man," the monumental block letters I and M painted over pages from the novel read as a powerful declaration of identity: "I am".
Mr. Morris, in a brief conversation before Flag's set on Monday, put Flag's existence as a basic declaration of identity: the core of Black Flag came from the same square mile of Hermosa Beach, Calif.
If you can't log in to that old e-mail account, don't worry: Myspace will let you close the account after you prove your identity by completing a declaration form at http://myspace.desk.com/customer/widget/emails/new.com/customer/widget/emails/new
