Got given a courtesy car for two days from Toyota on 25th November 2019.
Today I got a PCN from Horizon dated 19th November 2019. I didn't have the car then.
The letter does mention that I should let them know if I wasn't driving, just want to check if this is the correct thing to do, I don't really want to enter into any correspondence with a parking company. No doubt that will go missing in the post anyway.