Corporations still use checks—particularly to pay debt and penalties and such—because it’s a better deal for them: the debt is counted as having been paid immediately, but it takes a few days for the money to actually transfer. That’s more time for that money to generate interest for them. On a payment of millions, that’s worthwhile to them. Electronic transfers remove the money from the sending account immediately, so they don’t get that extra bonus interest.
Corporations still use checks—particularly to pay debt and penalties and such—because it’s a better deal for them: the debt is counted as having been paid immediately, but it takes a few days for the money to actually transfer. That’s more time for that money to generate interest for them. On a payment of millions, that’s worthwhile to them. Electronic transfers remove the money from the sending account immediately, so they don’t get that extra bonus interest.