Will creditors take my mom’s shares?

My mum passed last year, she didn’t have any money and like $4000 in credit card debt. I sent the letter off as you’re supposed to saying please close the card, there’s no estate. So almost a year later we got a letter and apparently she had some old American shares from a job in the 80s. They’re not worth a lot but I’m afraid if I transfer them into my name that credit card company will take them. I’m ok to pay them if I have to I just don’t want something my mom worked for (the actual share) and was something of hers to be gone. How does this all work? Is there a chance they’ll take the actual shares away or ask for payment?

Update: Can anyone tell me what kind of professional I can ask for help with this to make sure it’s done properly? Is it a tax specialist, a lawyer, an accountant?