> For the complete documentation index, see [llms.txt](https://docs.sportradar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sportradar.com/transaction30api/sandbox/user-manual/fallback.md).

# fallback

**Goal:** Show what happens when **no sandbox route matches** — a successful protocol round-trip with a **rejected** reply, code **-999**, message **`No matching sandbox scenario found`**.

Sandbox module name: `fallback` (`fallback_scenario`).

## When this fires

Any supported operation whose facet tuple does not match a `ROUTING_TABLE` row (after wildcard / trailing-`None` relaxation) lands here. That includes:

| Operation (SDK)                     | Reply content type                       |
| ----------------------------------- | ---------------------------------------- |
| `sendTicket`                        | `ticket-reply`                           |
| `sendCancel`                        | `cancel-reply`                           |
| `sendCashoutInform` / `sendCashout` | `cashout-inform-reply` / `cashout-reply` |
| `sendMaxStake`                      | `max-stake-reply`                        |
| `sendTicketInform`                  | `ticket-inform-reply`                    |
| `sendExtSettlement`                 | `ext-settlement-reply`                   |

Handle with `if` on the typed response (`getCode() == -999`), **not** try/catch. Transport / schema failures are different — see parent [Error responses](broken://pages/3cdf760ce49fd6992d47d7772f4a4b9f67f0519f#error-responses).

## Example: wrong placement customer + event

A ticket that looks like [`single_accepted`](broken://pages/e84b9421dafc72a9793b6db53513e5046ff022e6) but uses an unknown customer and/or wrong event does not match any placement row.

### Java example

```java
import com.sportradar.mbs.sdk.entities.channel.Channel;
import com.sportradar.mbs.sdk.entities.common.AcceptanceStatus;
import com.sportradar.mbs.sdk.entities.common.Bet;
import com.sportradar.mbs.sdk.entities.common.EndCustomer;
import com.sportradar.mbs.sdk.entities.common.TicketContext;
import com.sportradar.mbs.sdk.entities.odds.Odds;
import com.sportradar.mbs.sdk.entities.request.TicketRequest;
import com.sportradar.mbs.sdk.entities.response.TicketResponse;
import com.sportradar.mbs.sdk.entities.selection.Selection;
import com.sportradar.mbs.sdk.entities.stake.Stake;
import java.math.BigDecimal;

TicketRequest request = TicketRequest.newBuilder()
    .setTicketId("tid-unknown")
    .setContext(TicketContext.newBuilder()
        .setLimitId(123L)
        .setChannel(Channel.newMobileChannelBuilder()
            .setLang("en")
            .setIp("127.0.0.1")
            .setDeviceId("deviceId123")
            .build())
        .setEndCustomer(EndCustomer.newBuilder()
            .setId("customer_does_not_exist")
            .build())
        .build())
    .setBets(Bet.newBuilder()
        .setBetId("bet-1")
        .setSelections(Selection.newUfSelectionBuilder()
            .setProductId("3")
            .setEventId("sr:match:99999999")
            .setMarketId("m1")
            .setOutcomeId("o1")
            .setOdds(Odds.newDecimalOddsBuilder()
                .setValue(new BigDecimal("2.0"))
                .build())
            .build())
        .setStake(Stake.newCashStakeBuilder()
            .setAmount(new BigDecimal("10"))
            .setCurrency("EUR")
            .build())
        .build())
    .build();

TicketResponse response = mbsSdk.getTicketProtocol().sendTicket(request);
// expect: REJECTED, getCode() == -999,
// getMessage() == "No matching sandbox scenario found"
```

### Wire JSON (request)

```json
{
  "operatorId": 9985,
  "correlationId": "corr-1",
  "timestampUtc": 1710000000000,
  "operation": "ticket-placement",
  "version": "3.0",
  "content": {
    "type": "ticket",
    "ticketId": "tid-unknown",
    "context": {
      "limitId": 123,
      "channel": {
        "type": "mobile",
        "lang": "en",
        "ip": "127.0.0.1",
        "deviceId": "deviceId123"
      },
      "endCustomer": {
        "id": "customer_does_not_exist"
      }
    },
    "bets": [
      {
        "betId": "bet-1",
        "selections": [
          {
            "type": "uf",
            "eventId": "sr:match:99999999",
            "marketId": "m1",
            "outcomeId": "o1",
            "productId": "3",
            "odds": { "type": "decimal", "value": "2.0" }
          }
        ],
        "stake": [
          {
            "type": "cash",
            "amount": "10",
            "currency": "EUR"
          }
        ]
      }
    ]
  }
}
```

| Field name                            | Value                                                                              | Mandatory / Optional | Data type | Ignored by sandbox      |
| ------------------------------------- | ---------------------------------------------------------------------------------- | -------------------- | --------- | ----------------------- |
| `content.context.endCustomer.id`      | `"customer_does_not_exist"`                                                        | Present              | string    | No (routing — no match) |
| `content.bets[].selections[].eventId` | `"sr:match:99999999"`                                                              | Present              | string    | No (routing — no match) |
| Other ticket fields                   | as in [`single_accepted`](broken://pages/e84b9421dafc72a9793b6db53513e5046ff022e6) | as usual             | —         | as usual                |

### Expected response (placement)

| Java getter     | Expected value                         |
| --------------- | -------------------------------------- |
| `getStatus()`   | `AcceptanceStatus.REJECTED`            |
| `getCode()`     | `-999`                                 |
| `getMessage()`  | `"No matching sandbox scenario found"` |
| `getTicketId()` | `"tid-unknown"` (echo)                 |

```json
{
  "correlationId": "corr-1",
  "timestampUtc": 1710000001000,
  "operation": "ticket-placement",
  "version": "3.0",
  "content": {
    "type": "ticket-reply",
    "ticketId": "tid-unknown",
    "status": "rejected",
    "code": -999,
    "message": "No matching sandbox scenario found",
    "signature": "sandbox-signature"
  }
}
```

## Same fallback on other operations

Examples that also yield **-999** / **`No matching sandbox scenario found`** on the matching reply type:

| Call                | Example mismatch                                            |
| ------------------- | ----------------------------------------------------------- |
| `sendCancel`        | Non-magic `ticketId` and punter not in `customer_cancel_*`  |
| `sendCashoutInform` | Non-magic `ticketId` and punter not in `customer_cashout_*` |
| `sendMaxStake`      | Nested event not `sr:match:15050881`                        |
| `sendTicketInform`  | `customer_inform` but `betValidations[0].code` ≠ `3`        |
| `sendExtSettlement` | `meta.punter.id` ≠ `customer_external`                      |

## Common mistakes

| Mistake                                                | Result                                                                                             |
| ------------------------------------------------------ | -------------------------------------------------------------------------------------------------- |
| Treating `-999` as `ServerErrorResponseException`      | Wrong — it is a rejected content reply on a successful round-trip                                  |
| Confusing multi-bet schema `error-reply` with fallback | Multi-bet without a special customer can be `error-reply` / exception; unmatched routes are `-999` |
| Wrong customer **or** wrong event on placement         | Either alone can fail the facet match                                                              |

See also: [Error responses](broken://pages/3cdf760ce49fd6992d47d7772f4a4b9f67f0519f#error-responses) in the parent manual.


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