firmware password on MacBook
my MacBook has been locked as it got stolen from me and when I found it and got returned to me, I was unable to open as it has asked some password I completely forgot what it was when I activated the Lock mode and marked it as Lost device using Find My and then I erase the MacBook from my Apple ID and iCloud account. My problem is I bought this MacBook through Gumtree as second hand goods and I could get the proof of purchase from the person I bought it from. However, I can show proof of purchase by showing to Apple the iMessages conversation including the details of the product and sellers address