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Launching partner round-ups without changing gateways

A short playbook for charities and the stores that support them.

1
Agree the cause story
Share impact messaging and branding guidelines with the merchant.
2
Issue keys
From Share widget / Merchants, provide the public key and webhook secret for logging.
3
Embed & test
Paste the script on checkout, verify the UI, then place a test order with round-up enabled.
4
Settle monthly
Use the ledger invoice so finance on both sides knows what was collected.