Why aren't you efiling this?

I don't think an e-signature is allowed on a paper filed return.

"The e-signature option is only available to taxpayers e-filing their tax returns through an ERO"

https://www.irs.gov/e-file-providers/frequently-asked-questions-for-irs-efile-signature-authorizatio...

Got it. 

So, can she resign over that signature, redate, and resend in this case? Or will the IRS want a fresh copy? 

Hmmmm, 

Dawn 

I had a client get one of these letters telling him they couldnt process his 1040X without a signature, but it was EFILED!!

I had him sign a copy of the 1040X and include the 8879 along with it too, I think they just have stupid people working at IRS.

That's what I would do, too.

Hand signing over or near the esig is probably too confusing for the IRS.