I got a letter in the post today from the “Domain Renewal Group”
It looked suspiciously similar to the “Domain Registry of America” scammer’s letters I’ve received in the past. And without too much effort I discovered they are indeed one and the same.
If you do receive a letter from one of those two groups, your best bet is to just throw it in the bin (assuming you haven’t already been convinced to switch to them as your domain name registrar).