The Treasury Department has ordered President Trump’s name be printed on stimulus checks the Internal Revenue Service is rushing to send to tens of millions of Americans, a process that could slow their delivery by a few days, senior IRS officials said.

The unprecedented decision, finalized late Monday, means that when recipients open the $1,200 paper checks the IRS is scheduled to begin sending to 70 million Americans in coming days, “President Donald J. Trump” will appear on the left side of the payment.