Opinion by
Senior Judge Kalish,Claimant, Ann Moltz, seeks review of an order of the Workmens Compensation Appeal Board (Board), which affirmed the referees decision to deny benefits to her. We reverse.
*356The claimant worked as a bookkeeper for a franchisee of McDonalds Corporation. On May 4, 1981, she was injured when she fell down a flight of stairs, located on the franchisees property. She sustained numerous back, body, head, and leg injuries. She filed a claim against McDonalds for workmens compensation, and received total disability compensation, pursuant to a Notice of Compensation Payable from May 5, 1981, through June 1, 1981, on which date she returned to work and signed a final receipt.
Thereafter, the franchise was terminated, relating back to McDonalds Corporation. The claimant continued working for McDonalds, and on June 1, 1982, her duties were changed from those of a bookkeeper to those of a McDonalds crew person and waitress. She continued to experience severe pain in her legs, body, and head. The claimant filed a petition to set aside the final receipt in March of 1984. In this petition, she alleged that her disability, caused by her compensable injury of May 4, 1981, was in existence and continued after the final receipt was signed.
The referee found from claimants testimony that her work changed from a. bookkeeper to a waitress. Her symptoms, which had started with her fall, became increasingly severe until she had to leave work on September 22, 1983. The claimant testified that she has not been able to work since this time. The referee found claimants testimony to be credible.
At the hearing before the referee, claimant presented the testimony of Dr. Joseph W. Krotec, who has been claimants family doctor for many years. He testified that, as a result of the neurological and physical examinations that he, performed, it was his professional opinion that claimant was suffering from concussion syndrome and multiple traumatic muscle problems of her muscular system. Notes of Testimony (N.T.) at 10.
*357Dr. Krotec was asked:
Q. Doctor, with reasonable medical certainty have you any opinion as to whether the fall which she sustained in May of 1981 had any relationship to what you found in your examination of September the 26th?
Dr. Krotec answered:
A. I feel with a reasonable degree of medical certainty that the fall was the cause of her post concussion syndrome and her other complaints. N.T. at 10.
Dr. Thomas C. Hohmann, a physician certified in the specialty of physical medicine and rehabilitation, testified for the employer. He opined that, based on the physical examination that he performed on the claimant and the x-ray films, the fall which occurred on May 4, 1981, aggravated a pre-existing pathology. N.T. at 19.
The referee accepted claimant’s testimony as credible, and found that claimant had not fully recovered from her compensable'injuries of May 4, 1981, when she signed her final receipt. Based on the record, this finding is supported by substantial evidence.
However, the referee found that claimant has not shown that her injuries have disabled her from performing the job of bookkeeper, which shé was doing at the time of'her injury of May 4, 1981. The referee’s finding, as affirmed by the Board, that it was incumbent upon claimant to prove that she could not perform her job as a bookkeeper, which she was doing at the time of her original injury, was in error.
The hearing before the referee was for the purpose of determining whether the final receipt should be set aside. In order to be entitled to the relief sought, all claimant had to show was that some disability still existed at the time she signed the final receipt. Sheibley v. Workmen's Compensation Appeal Board (ARA Food *358Services Co.), 86 Pa. Commonwealth Ct. 28, 483 A.2d 593 (1984).
Since the referee and the Board found that claimant had not fully recovered from her compensable injuries of May 4, 1981, when she signed her final receipt, the original compensation agreement automatically revived and restored the parties to their original position. It was as if the final receipt had never been signed. Therefore, the burden of proof shifted to the employer to show that compensation under the original agreement should be reduced or suspended. Taylor v. Workmen's Compensation Appeal Board (Doylestown Township), 108 Pa. Commonwealth Ct. 642, 530 A.2d 975 (1987).
If the employer wants to change the character of the disability, it must file a petition to modify or suspend, and present proof to show a change in the nature of claimants disability. Keystone Bakery, Inc. v. Workmen's Compensation Appeal Board (Lack), 88 Pa. Commonwealth Ct. 111, 488 A.2d 668 (1985).
Here, the employer has not filed such a petition. All the employer did in its answer to the claim petition was to deny that the work-related injury continued after the final receipt.
In the absence of such a petition, to address such issue was an error. The fact that claimant did not prove that she was disabled from performing her work as a bookkeeper, at the time of her injury, was not relevant.
Accordingly, the order of the Board is reversed.
Order
Now, September 12, 1988, the order of the Workmen’s Compensation Appeal Board, No. A-91769, dated July 10, 1987, is reversed.