So I had some money deposited into my account outta the blue, (amount is irrelevant) and the transaction description read RBCDS BLOCKED MTG just like that. Now I'm assuming, RBCDS would be Royal Bank Canada Dominion Securities? I have no products with them and never have, my bank told me that they'd investigate and it could take a few weeks but I thought I'd ask around in the meantime since this is really baffling. Obviously not gonna keep/spend that money until I know where it came from. Any idea what may have happened here?