You are right Leslie, these invisible "fax only" suppliers NEVER send a proper records release, so we don't really have to respond at all.
My office recently had the same issue with a nurse who promoted herself to a "geriatric case manager", and started demanding tests and meds for her clients, and wanted to "consult" with me by phone. I told the patient to either fire her or me.
Is it just me, or have these medical sharks multiplied in the past few years?