Was the original LLC a "Disregarded Entity" (a Single Member LLC that did not have any elections to be taxed as a corporation)?

Is it still an LLC, but merely made the S-election by filing Form 2553?

Or did the taxpayer legally form a new corporation, or legally convert the LLC to a corporation, through the Secretary of State, and then file Form 2553 to be taxed as a S-corporation?

Do you have a copy of the acceptance letter for the S-election?