Anything is worth trying, but, not unexpectedly,  it didn't work.  The extension has still not been filed, the 9325 that I have with the names, addresses and social security numbers of this client is nowhere in the return now,   Filed extensions REALLY shouldn't just vanish.   Nothing filed should vanish.  I couldn't prove last year that this is what happened so I paid the penalties, but this year I can prove it.