I received a letter from PRA today in response to my second letter asking that they actually validate my debt.
It states briefly that "courts have stated that verification of a debt involves 'nothing more than the debt collector confirm in writing that the amount being demanded is what the creditor is claiming is owed.'" Then they reference Azar v Hayter, Chaudry v Gallerizzo, Smith v Transworld, Graziano v Harrison and Mahon v Credit Bureau of Placer County, Inc.