Zettle links with an API key that you create in your own Zettle account. Only the Paddl account owner can link a till.
Create the key in Zettle
Sign in at my.zettle.com with the account that owns the shop.
Open Integrations, then API keys, and create a key. Name it Paddl.
Give it permission to read purchases and products.
Zettle shows a Client ID and the API key itself. Keep the page open: the key is only shown once.
Paste it into Paddl
In Paddl, press Link your till on Sales > Takings, then Connect next to Zettle.
Paste the Client ID and the API key, and press Connect Zettle. Paddl checks them with Zettle before saving, and stores them encrypted.
A Zettle account is one location. If your business has one site in Paddl, they are paired for you; otherwise pick the site under Settings > Integrations.
What comes in
Every purchase from the last thirteen months, then new ones every half hour: takings, card and cash, tips, refunds and each product sold, which feeds Sales > What sold and the allergen check for products with no allergen record.
Stopping it
Delete the key in Zettle, or press Disconnect under Settings > Integrations. Takings already brought in are kept.