How often is this happening? If criminals are aware that 401k transfers are done using cheques in the post, and some of the addresses these are typically sent t

How often is this happening? If criminals are aware that 401k transfers are done using cheques in the post, and some of the addresses these are typically sent to, then I'm expecting this to be a very common type of fraud. Yet the practice of 401k cheques in the mail continues? Weird.