When this collection agency first contacted me ( XX/XX/XXXX ) about an alleged {$180.00} debt from XXXX, I immediately sent a debt validation request ( XX/XX/XXXX ), requesting bills, contract, etc. They did NOT send me any of the requested information, but they did stop calling and writing me for exactly 1-year. Now, *EXACTLY* ONE-YEAR later to the day ( XX/XX/XXXX ), they mailed me another letter, and are calling me again ( XXXX times a day ). This is without providing any of the validation requested in XX/XX/XXXX. What is more disturbing is that they changed their name from XXXX XXXX to Diversified Adjustment Service and changed my account number, presumably to wrongly renew collection efforts, which they would not typically be able to do, having not responded to my validation request.