NYS 2011 corp efile status - how to find

[schirallicpa]

I have a client that was applying for a loan and the loan officer did a tax search and found that the great state of NY shows that the 2011 return was not filed and the franchise fee was not paid.  My paperwork is all in the file.  However, how do I prove now that a return was filed and accepted by NYS.  The myATX website only goes back to 2016.  Wondering if there was another trick to finding that a return had been efiled.  

(At this point I haven't tried to upload old ATX data files on the old computer to see if it would provide anything.  But I'm thinking I need something from NYS's end not my end to make my case.)

I appreciate any insights.  

(I just dread trying to deal with NYS!)