In SEPTA v. Workmen's Compensation Appeal Bd. (Henderson), 543 Pa. 74, 669 A.2d 911 (1995), the claimant injured his knee while working for the employer and received total disability benefits pursuant to a notice of compensation payable. He returned to a light-duty position with the employer and his benefits were modified to partial disability. Later he returned to total disability, but then went back to partial disability. Further litigation followed about his proper disability status. The claimant testified "that he was receiving Social Security retirement benefits and that he was applying for a pension from the employer on his 65th birthday, June 18, 1989." Henderson, 543 Pa. at 76, 669 A.2d at 912. There was also "evidence that he began receiving pension benefits on July 1, 1989. The claimant testified that he was not looking for work." Id. Therefore, the WCJ determined that the claimant was retired as of July 1, 1989 and not entitled to further WC disability compensation. The Board reversed the WCJ, and this Court affirmed the Board on the grounds that "there must also be unequivocal evidence that the claimant has no intention of seeking employment after retirement." Id. The Supreme Court reversed this Court, stating: It is clear that disability benefits must be suspended when a claimant voluntarily leaves the labor market upon retirement. The mere possibility that a retired worker may, at some future time, seek employment does not transform a voluntary retirement from the labor market into a continuing compensable disability. An employer should not be required to show that a claimant has no intention of continuing to work; such a burden of proof would be prohibitive. For disability compensation to continue following retirement, a claimant must show that he is seeking employment after retirement or that he was forced into retirement because of his work-related injury. Id. at 79, 669 A.2d at 913. In Henderson, our Supreme Court stated: It is clear that disability benefits must be suspended when a claimant voluntarily leaves the labor market upon retirement. The mere possibility that a retired worker may, at some future time, seek employment does not transform a voluntary retirement from the labor market into a continuing compensable disability. An employer should not be required to show that a claimant has no intention of continuing to work; such a burden of proof would be prohibitive. Id.