---
title: "Change a dunning policy"
description: "A new config replaces the whole stored set and applies to every customer on the policy from their next dunning step."
canonical_url: "https://twominutebilling.com/help/developers/api-reference/dunning-policies/change-a-dunning-policy"
---
# Change a dunning policy

> A new config replaces the whole stored set and applies to every customer on the policy from their next dunning step.

<api-operation method="PATCH" path="/v1/businesses/{biz}/dunning_policies/{dpol}">
<template v-slot:docs="">

A new `config` replaces the whole stored set and applies to every customer on the policy from their next dunning step.

## Path parameters

<table>
<thead>
  <tr>
    <th>
      Parameter
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        biz
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      Business id (biz_…)
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        dpol
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      The dpol.
    </td>
  </tr>
</tbody>
</table>

## Headers

<table>
<thead>
  <tr>
    <th>
      Parameter
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        Idempotency-Key
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      Safely retry writes — repeats return the original response. If a write FAILED after it had already taken effect, that failure is what repeats: the key is spent, and a new attempt needs a new key.
    </td>
  </tr>
</tbody>
</table>

## Body

The request body is **required**.

<table>
<thead>
  <tr>
    <th>
      Field
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        name
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      The name operators see.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        code
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      A unique code among live policies.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        description
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      An optional description.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        config
      </code>
    </td>
    
    <td>
      <code>
        object
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      The per-invoice dunning keys of <code>
        dunning_config
      </code>
      
       (enabled, mode, retries, final_action, dunning_period_days, skip_retries_for_hard_failures, park_hard_declines, adaptive_timing, minimum_amounts, dun_offline_invoices, dun_one_time_invoices, dun_trial_and_future_subscriptions, retries_by_method, adaptive_cadence). Absent keys take the defaults; the policy stores the full set. Business-wide keys are refused.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        expected_version
      </code>
    </td>
    
    <td>
      <code>
        integer
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      Optimistic concurrency: current resource_version; 409 on mismatch
    </td>
  </tr>
</tbody>
</table>

## Status codes

<table>
<thead>
  <tr>
    <th>
      Status
    </th>
    
    <th>
      Meaning
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        200
      </code>
    </td>
    
    <td>
      Updated
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        400
      </code>
    </td>
    
    <td>
      Invalid body
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        404
      </code>
    </td>
    
    <td>
      No such dunning policy
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        409
      </code>
    </td>
    
    <td>
      The code is in use, or a version conflict
    </td>
  </tr>
</tbody>
</table>
</template>

<template v-slot:request="">

```bash [Request]
curl -X PATCH "$TMBILLING_URL/v1/businesses/biz_XXXXXXXXXXXX01/dunning_policies/Dpol" \
  -H "Authorization: Bearer $TMBILLING_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Brightwater Analytics",
    "description": "Everything a growing team needs."
  }'
```

</template>

<template v-slot:response="">
<code-group>

```json [200 OK]
{}
```

```json [400 Bad Request]
{
  "error": {
    "type": "invalid_request_error",
    "message": "Invalid body"
  }
}
```

```json [404 Not Found]
{
  "error": {
    "type": "invalid_request_error",
    "message": "No such dunning policy"
  }
}
```

```json [409 Conflict]
{
  "error": {
    "type": "conflict_error",
    "message": "The code is in use, or a version conflict"
  }
}
```

</code-group>
</template>
</api-operation>


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