seal of approval
noun [ S ]
ukus COMMERCE
a mark or symbol on a product showing that it has been tested by an official organization, and has been found to be of the right standard:
Firms that comply will be eligible for a seal of approval on their products.
a statement or sign that someone in an important position approves of something:
be given/get a seal of approval The new guidelines were given the seal of approval by the director of the IMF.