Another CRA scam, the same as reported here: http://800notes.com/Phone.aspx/1-613-707-0198

Aggressive accented man claiming to be from CRA. Stated that a random audit of my account showed several miscalculations over the past few years, and a law suit had been lodged against me. I laughed, and said you're scamming me. He said he wasn't, and told me to get a lawyer ASAP. I then asked him for my social insurance number.... pregnant pause and then he hung up!