https://www.idiomsandslang.com/give-...carte-blanche/
(Give Someone) Carte BlancheDefinition: Allow someone complete freedom; entrust a decision to someone
Example: I’ll give you carte blanche to hire whoever you think is best. I’m going on vacation, and I’ll be back in two weeks.==================================
"Carte Blanche" is from French, meaning "white paper". Do you use this idiom a lot?
There seems to be an origin for this from the UK as well like the following.
When King Charles the Second was fleeing the Roundheads, he is reputed to have offered his helpers a 'Carte Blanche'. This was a 'White Card', a blank sheet of paper with his signature at the bottom. The recipient of this could then write anything they wanted above the royal signature and it would be legal.

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