Do not emulate credits by sending negative customer-usage events. Those events can change a Sum meter’s aggregate, but they are not recorded as first-class credited units. Use the Meter Credits deliverable when the balance must distinguish issued credits from consumed usage.
Choose when credits are issued
Configure the flow
1
Create a usage tracker
Open Catalog → Usage trackers, create the tracker that measures the billable activity, and save it.
2
Create the deliverable
Open Catalog → Deliverables, create a Meter Credits deliverable, select the usage tracker, and set the number of units to issue.
3
Choose rollover behavior
Enable Rollover unused credits only when remaining subscription credits should carry into the next cycle. Changing this setting affects newly issued credits, not credits already granted.
4
Attach it to the product
Add the deliverable to the one-time or recurring product that should fund usage, then save the product.
5
Verify in sandbox
Complete a sandbox checkout and read the customer’s meter balance. For subscriptions, repeat the check after a test cycle to confirm the recurring grant.