We get hundreds of these, both from Social Security and Medicaid. SSA has been submitting the requests electronically for years using the SSA 4641 method, but Medicaid just started using a similar method last year. Accuity Solutions is the service the government uses to submit the requests via electronic means.
As for privacy concerns, the below disclaimer accompanies all requests that are submitted.
"I certify that the applicable provisions of the Right to Financial Privacy Act of 1978 (12 U.S.C. 3401-3422) have been complied with in this request. Pursuant to the Right to Financial Privacy Act of 1978, good faith reliance upon this certification relieves your institution and its employees and agents of any possible liability to the customer in connection with the disclosure of these financial records"
The electronic requests seek the same information as the paper ones, but the FI is notified of the requests via emails sent to the employee or employees tasked with handling them.