How can I prevent my cat from scratching at the door?

One effective way to prevent your cat from scratching at the door is to provide alternative scratching surfaces, such as a scratching post or pad, near the door. You can also use deterrents like double-sided tape or citrus-scented sprays on the door to discourage scratching. Additionally, make sure to provide enough mental and physical stimulation for your cat to prevent boredom, which can lead to destructive behaviors like scratching.