The phrase "a document attesting" is correct and usable in written English.
It can be used when referring to a document that serves as proof or confirmation of something, such as a fact or a claim.
Example: "Please provide a document attesting to your employment history for verification purposes."
Alternatives: "a document confirming" or "a document verifying".
Essam was accepted as a seller, then had to sign a document attesting that he was a volunteer.
So Mr. Ali, according to Mr. Sassone, had the man sign a document attesting that they bought the ticket together.
A former guard tells Jesse Ball that, just before a condemned man is executed, officials sign a document attesting that the prisoner is who he says he is.
The best conflict-of-interest measure he could envision was a document attesting that President Trump would not be involved in the running of his companies.
Perhaps already foreseeing a separation (divorce would not become legal until 1884), Monsieur Mauté asked a doctor to examine the bruises and to sign a document attesting to what she had suffered.
"They had a signing ceremony, in which the – at that time – 62 members all signed a document attesting to the fact that they had not only been elected but were sworn members of the academy," she continued.
She wants a written document attesting that she is, as the book says, "intact".
Barney herself was one-quarter Jewish, and since she spent the war in Italy with Romaine Brooks, risked deportation to a concentration camp a fate she avoided only by wiring her sister Laura for a notarized document attesting to her confirmation.
Now 60, Baron claims to work solely for her own satisfaction, shows her work with great reluctance and describes it as "a form of document attesting to events I cannot forget". Precisely what she experienced is recounted in text posted throughout the exhibition and it's as horrible as anything you could imagine.
The foundation date of the Castle of Zena are still unknown, though the first document attesting its presence dates back to 1216.
This was the solitary legal document attesting to Mark's alienage on which ICE relied when issuing Mark's "Final Administrative Removal Order" on September 5. ICE also had Mark's FBI record designating his citizenship as "UNTD STATES AMERICA". And ICE had Mark's social security number.
