Firstly, you'll need to install the Postly app on your Shopify store.

Next, you'll need to register or login to your Royal Mail Click and Drop account.

From the dashboard select "Integrate your online stores" then click the "Add a new integration" button in the top right and select "Click and Drop API" from the resulting modal. Do not select "Shopify" or "Click & Drop Desktop" or Postly will not connect properly.

Once you've selected "Click and Drop API", the Trading Name and Integration Name can be filled out however you like. Leave the two checkboxes blank and click "Save".

The status on the Integrations dashboard will be red. You need to click the integration name and click "Update and Connect" to make the connection active. On the same screen, copy the Click & Drop API authorisation key to your clipboard

Now go back to your Shopify store dashboard. Click Edit and paste the Click & Drop API authorisation key into the first input box. Click "Save". A green success message will appear if this is done successfully and the task will be marked as complete

Select whether you want your customers to be notified of dispatch via email or the shop app and confirm your settings

Done! You've now connected your Shopify store to Royal Mail. You can explore more advanced features like adding filters or auto-syncing via the menu on the left of Postly.