The OU released the following alert:
Some Year-round OU-certified products may have Passover certification from an agency other than the OU. Please note that the OU does not stand behind the Passover certification from other agencies, and it may not meet the OU’s standards.
OU Passover certification may have OU-P or Kosher for Passover ink-jetted on the Year-round version of the product. In addition, OUP or OU Kosher for Passover stickers are only authorized when they bear the company or the brand name of the product.
Stores or distributors have been known to place Kosher for Passover stickers on products which were not manufactured with Passover standards.
by the way you will rarely ever see a OU hechsher on a pesach program, b.c. most programs cant abide by their strict mandates of kashrus, I was once by a program that had a OU , it was unreal, there was 18 mashgichim there