Backstory: One of my friends and his wife recently had a baby shower, they received lots of gifts and are now sifting through all the presents to send thank you notes.

The Idea: An automated thank you card service.

Deep Dive: You would hook into different registry sites such as Amazon and Target as well as a hand writing notes service such as https://www.handwrytten.com/. You would build a simple website so people could automatically send a generic thank you or manually approve all notes and append a personal message as well.

Validation: This is automating an existing boring and long process.

Monetization: You would charge per note sent. You could allow users to prepay a set or experiment with a monthly unlimited.