53 Pa. Stat. § 7431
Whenever, heretofore or hereafter, any tax lien or municipal claim is or shall be defective, by reason of error in the name or names of the registered owner or owners thereof or by reason of the fact that the description of the property and the street address set forth in the claim as filed do not conform with each other, the claimant entering or filing such tax lien or municipal claim shall have the right, at any stage in the proceedings, to file an amended tax or municipal claim so that the correct name or names of the registered owner or owners and the correct description of the property shall appear therein; and, upon the filing of the amended tax or municipal claim, such lien or claim is hereby declared to be valid to all intents and purposes, and such liens or claims may be enforced as in the case of liens or claims entered or filed in the name or names of the proper registered owner or owners and with a correct description of the property: Provided, however, That no further proceedings shall be had upon such tax lien or municipal claim, whether or not judgment has theretofore been entered upon any writ of scire facias theretofore issued, until after a writ of scire facias has been issued upon the lien or claim as amended and has been served in the manner provided for the service of such writs in the acts of Assembly relating to tax liens and municipal claims, and has been duly reduced to judgment: Provided further, however, That this act shall not apply to any property where change of ownership has occurred previous to the filing of the amended tax or municipal lien, and such amended tax or lien shall not take priority over any mortgage or judgment recorded or entered subsequent to the filing of the original tax or municipal lien but previous to the filing of the amended tax or municipal lien.
53 P.S. § 7431