My husband's employer just moved their 401k plan to a new company last month. We knew the change was coming and were not too concerned, since these transfers usually go smoothly. We received a postcard about a month ago letting us know "Your plan's transition is complete" on the front of the card. I kept it for awhile because I figured we should look at his plan online once it was set up, and on the back of the card were the instructions for doing so. Well, looking at the back of the card today, I saw that they specifically say you have to designate beneficiaries with the new plan, as those were not transferred over during the switch from the former 401k company. I was hoping they just put that on the card as a precaution, but no, once we logged on the website for his new plan, there were no beneficiaries listed for his account! I'm so thankful I kept that card and didn't just throw it away like I fear some employees might do, thinking it is junk mail or not that important. Designating the beneficiaries probably wouldn't have changed how the funds would have been legally distributed anyway in our case, but for people with more complicated family structures, this can be a huge oversight if beneficiaries are not designated! So, even if you think the 401k administrators are transferring everything over, make sure you check on your beneficiaries any time they change companies!