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    Amending a Subscription
    Subscriptions store customer details using a Token Management Service (TMS) token and
                have an assigned payment plan. Subscriptions consist of this information: 
- Subscription code
 - Subscription name
 - Start date
 - Token Management Service (TMS) token
 - Plan: standard or one-time
 
IMPORTANT
The subscription information that you can amend
                depends on the status of the subscription. Note the limitations described in in the paragraphs that follow.
For a 
pending
 subscription, you cannot change this information: - Customer ID
 - Currency
 - Billing period unit and length
 
For an 
active
 subscription, you cannot change this information: - Customer ID
 - Currency
 - Start date (Payment processing time starts at 2:00a.m. in your time zone.)
 - Billing period unit and length
 - Set-up fee
 
For a 
delinquent
, suspended
, cancelled
, or completed
                subscription, you can update only the subscription name and code.IMPORTANT
When you change the plan ID assigned to a subscription, the first payment
                is processed immediately. If proration is required after the change, it must be managed
                outside of the recurring billing service.
Follow these steps to amend a subscription:
- Include any optional amendable fields in the request.
 - In the endpoint path, include the subscription ID that you received when you retrieved a list of subscriptions.
 - Send the request to the recurring billing endpoint:
ADDITIONAL INFORMATION
PATCH https://<url_prefix>/rbs/v1/subscriptions/{id}ADDITIONAL INFORMATION
Use one of these URL prefixes: