post
https://{tenantUrl}/public-api/actions/session/v1.0//change-tariff
Change the tariff for a session and trigger recalculation of charging periods.
This action supports loyalty program integrations where discounts need to be applied mid-session.
The tariff change is only available when:
- Billing status is NOT "Completed"
- For running sessions: duration is under 3 hours
- For roaming sessions (the platform as eMSP): session must be finished and have a CDR received
- No recalculation is already in progress
- For local charge point sessions: a StartTransaction message must exist
- The session's billing is not owned by an upstream roaming partner (broker sessions with upstream-sourced CDRs)
- The selected tariff already has usable concrete pricing
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Action accepted. The tariff has been changed and charging periods are being recalculated.