Clearing checks for banks (which the Fed still does)?

FORBES: How Capitalism Will Save Us

" It was clear that the arrangements for clearing the backlog of checks was going to take longer than we had hoped, " she said.

BBC: Heads given teacher clearance powers

It checks a user's identity, looks up his rights, contacts a financial clearing-house to arrange payment and, if everything is in order, decrypts the digital work.

ECONOMIST: Digital rights and wrongs