How would I find out if/where crypto I bought might be accessed?

Hello.

I'm moving and as I was packing/throwing stuff away I found a sealed envelope that said "\[my name\] crypto - do not throw away" on the front. Inside there is a piece of paper with 12 seemingly random words and at the top it says "all lowercase".

I don't remember buying crypto, but maybe I did in the 2010's? If I do have crypto somewhere how can I find out where it is? Is there a "wallet" or other storage solution that specifically uses 12 word passwords? Would I have some email somewhere that would let me know I made an account somewhere?

Thanks for all your help.

EDIT: the envelope wasn't sent to me. I hand wrote all the words on a piece of paper and put it in the envelope at some point.