Jerry Geiger at Newman Williams published a blog last week titled "Pennsylvania Mechanic's Lien Missteps."  The article focused on a common mistake made by lien claimants in Pennsylvania; best summarized by Geiger with this sentence:

"In each case [that Geiger handled to remove invalid mechanic liens in Pennsylvania] ...the claimant assumed the affidavit of service requirement was satisfied when notice of the claim was served on the property owner by a third-party."