---
title: Probability To Recover Updated Callback
slug: fourkites-api-reference/probability-to-recover-updated-callback
createdAt: 2024-01-29T17:45:42.000Z
---

It is triggered when the FourKites load is updated with PTR, as well as if there’s a change in PTR from one value to another. 

It doesn’t get triggered when the PTR is set to null.

```json
{
"CarrierEtaEnd": "2023-06-04T12:00:00Z",
"CarrierEtaStart": "2023-06-04T12:00:00Z",
    "FourKitesLoadId": 9720297,
    "LoadNumber": "callback-5",
    "MessageType": "PROBABILITY_TO_RECOVER_UPDATED",
    "ProbabilityToRecover": "no risk",
    "TrackingNumber": null
}
```

## Field Definitions

| **Field Name**         | **Description**                                                                                                                                                                                                                                                                                                                                                           | **Key Always Present?** | **Value Always Present?** | **Conditions for the Key to be Present**     | **Data Type** | **Max Length** |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------- | ------------------------- | -------------------------------------------- | ------------- | -------------- |
| `LoadNumber`           | Unique shipment identifier from shipper's system                                                                                                                                                                                                                                                                                                                          | Yes                     | Yes                       | N/A                                          | String        | 65535          |
| `FourKitesLoadId`      | Unique load identifier from FourKites system if the load was successfully created (IsSuccess = true). The field will be null if the load creation failed in FourKites                                                                                                                                                                                                     | Yes                     | Yes                       | N/A                                          | Number        | 20             |
| `TrackingNumber`       | Unique Tracking Number of the Carrier                                                                                                                                                                                                                                                                                                                                     | Yes                     | Yes                       | TrackingId will be mapped to FourKitesLoadId | String        | 1024           |
| `CarrierEtaStart`      | Start Time of the Predicted Carrier ETA                                                                                                                                                                                                                                                                                                                                   | Yes                     | Yes                       | N/A                                          | String        | 30             |
| `CarrierEtaEnd`        | End Time of the Predicted Carrier ETA                                                                                                                                                                                                                                                                                                                                     | Yes                     | Yes                       | N/A                                          | String        | 30             |
| `ProbabilityToRecover` | High, Medium or Low. This value represents how likely is it for a delayed shipment to recover to acheive the informed Commit Date.<br />High - Shipment is Late but highly likely that it will recover and deliver within the Commit Time<br />Medium - Shipment is Late but less likely to recover<br />Low - Shipment is Late but very unlikely achieve the commit time | Yes                     | Yes                       | N/A                                          | String        | 255            |