Avangate Integration
by Ivan Denysov
1. for company admin
1.1. Subscribe to billing plan during trial
1.2. Subscribe to billing plan after trial ended
1.3. Upgrade/Downgrade subscription
1.4. Disable subscription (Switch to 'Forever Free')
1.5. Disable subscription (part of close company)
2. for system admin
2.1. Change billing plan - disable subscription
2.2. Close company - disable subscription
2.3. Postpone/accelerate subscription renewal (change end date)
