This collection agency, who had failed to respond to my 2014 debt validation request ( which they acknowledged receipt of, copy attached ), and stopped contacting me for 1 year ... Then, 1 year later, still without responding, they " transferred my file '' debt to another collection agency ( from Diversified Consultants to Diversified XXXX ), WITHOUT notifying the predecessor collection agency, that they received and did not respond to, a validation request. This is obviously illegal ( and an EVEN MORE EGREGIOUS violation if " Diversified Consultants '' and " Diversified XXXX '' are related entities ). A debt collection agency can not " transfer '' a file to other agencies after failing to respond to a validation request ... and start contacting the consumer again, forcing the consumer to respond to MULTIPLE debt collection agencies about a SINGLE alleged debt that is invalid. Instead of responding to debt validation letters, this agency just " transfers '' the file to another company, and resumes collection activity to fully circumvent the federal law requiring that collection activity STOP UNTIL the requested validation information is provided.