This is an Ohio State issue. It appears to have been implemented by the state due to high volumes of fraud.
Per the Ohio Department of Taxation:
With income tax fraud and identity theft on the rise, the Ohio Department of Taxation (ODT) is committed to safeguarding taxpayer dollars by increasing security measures. The identity verification letter is just one of the tools ODT is using to prevent fraudsters from receiving a refund as a result of identity theft.
Click here for Ohio State information on "Where Is My Refund?
Click here for information on the Ohio "Identity Verification Letter".
