I just got a cheque in the mail from DRX had no clue what it was...

I just got a cheque in the mail from DRX had no clue what it was for, it was for $490 . I first thought if there was a cash component to the offer then after a few minutes of thinking I realised I had some shares in MLM in a very old trading account. So must have been under the limit of small shareholdings which i didnt kniow about I would have preferred to keep them in saying that its the first time i have ever got a return from my MLM shares. lol Now I need to go through all my paperwork to see what the cost basis of these shares were I had them for close to 20 years (before we were called Metallica) at a guess they probably cost closer to $2000.