There is two-year statute of limitations that applies to workers’ compensation cases. A formal Claim Petition must be filed within two years of the date of injury or the date of last payment of compensation, whichever is later. Medical treatment authorized by the employer is considered a payment of compensation. In cases of occupational illness, for example – asbestosis, lead poisoning or hearing loss, the Claim Petition must be filed within two years from the date the worker first became aware of the condition and its relationship to employment. Please note that the filing of an application for an informal hearing does not stop the two-year statute of limitations from running.