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1. When someone Subscribes using the Platform, you can use the Subscription Added Callback.
2. When someone updates their preferences and personal data outside of the Platform, you can use the Update a Person API.
   Note: If there is custom data you want to store, you need to set up the custom fields ahead of time.
3. When you need to add data about your Subscribers, use the Add Person API Call.
4. When someone unsubscribes, you can use the Subscription Removed Callback.

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SUCCESS: 200
Same Person body you submitted is returned
 
 
FAILURE: 404 - person not found
no body
 
FAILURE: 409 - MDN cannot be changed
no body

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Add a Person

Use the following to create a new Person record.

The person_id, timezone_source, created_at and updated_at fields are not allowed, and any values will be ignored.

The mobile_phone field is optional and can be omitted. All custom fields are also optional and may be omitted.

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Situation Three: When a Subscriber Opts Out

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