Write the card that goes in every parcel

Help me write a parcel insert card.

What I sell: [products]
Where I sell: [e.g. my website, Etsy]
What I want customers to do next: [one thing: review, reorder, follow, refer a friend]
Card size: [e.g. A6]
My voice: [e.g. friendly, quirky]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. Two versions, each with front and back text: a personal thank you and one clear next step.
2. Any care or how-to tip worth including.
3. A simple way to tell which card works better (e.g. two codes).
4. A reminder that review requests shouldn't be tied to rewards, and to follow the selling platform's own rules.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts or results. UK English, short enough to read in 10 seconds.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.