'certificate stating that' is a correct and usable phrase in written English.
For example, you could use the phrase in the sentence, "He presented a certificate stating that he had graduated from his university program."
They include a complaint that Yar Mohammad Karzai filed with the Dand district police in Kandahar Province naming Hashmat Karzai as Waheed's assailant, the boy's hospital records and a death certificate stating that he died of gunshot wounds.
On another wall was a framed certificate stating that George Henry Hunter was a life member of St. John's Lodge No. 29 of the Most Worshipful Prince Hall Grand Lodge of Free and Accepted Masons.
Under the law approved by the national assembly, all models, both men and women, must have an independent doctor's certificate stating that their body-mass is compatible with both their health and the requirements of the fashion industry.
The attorney general and the lord chancellor, Lord Falconer, acknowledge that they would not be able to give the customary certificate stating that the legislation is compatible with the human rights convention.
The hospital provided a medical certificate stating that Marsh could not move his elbow while encased in the splints.
Arpaio has recently begun an investigation into the authenticity of Obama's birth certificate, stating that the birther issue is a conspiracy "bigger than Watergate".
The certificate stated that I was British from the inauspicious date of 1 April 2009 onwards.
My mother's death certificate stated that she died of "cardiac arrest".
Her death certificate stated that her death had been "accidental".
The death certificate stated that the immediate cause of Mansfield's death was a "crushed skull with avulsion of cranium and brain".
The certificate stated that a star had been in named in my honor and even had the exact coordinates of the specific star.
