Unsolicited Attachments for a 275 Claim Transaction

Use the providerAttachmentControlNumber as the control number value in the serviceLines JSON object.

```json
  {
    "serviceLines": [{
      "providerAttachmentControlNumber": "123456789"
  }
```

The key JSON elements in Unsolicited attachment transactions are:

• providerAttachmentControlNumber

• payerAddress and its elements

You send Unsolicited attachments as part of the process of submitting 275 claim transactions, which contain attachments as standard documentation for the claim. The Worker's Compensation claim is a good example; with this claim, it is expected that attachments may be forwarded as a part of the claim submission. See example in API Examples.

You use the providerAttachmentControlNumber as the control number value in the serviceLines JSON object.

```json
  {
    "serviceLines": [{
      "providerAttachmentControlNumber": "123456789"
  }
```

Unsolicited transactions will contain the optional payerAddress object, which has the payer's address information.

```json
  "tradingPartnerName":"Happy Payers of Washington State",
  "payerAddress": {
      "address1": "123 address1",
      "city": "city1",
      "state": "wa",
      "postalCode": "981010000"
    },
```

Use this address information in the request body when you need to mail the physical attachments to the payer. This may be necessary when the payer does not support either electronic attachment transactions or fax.