> ## Documentation Index
> Fetch the complete documentation index at: https://docs.useroutr.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Error reference

> Every error code, what causes it, and how to resolve it.

Every error carries a stable `code` and a `docs_url` pointing at its page here. Branch on the code, never on the message.

See [Handling errors](/guides/handling-errors) for the response shape and retry patterns.

## Amount

| Code                                                   | Retryable | Summary                                                      |
| ------------------------------------------------------ | --------- | ------------------------------------------------------------ |
| [`amount_below_minimum`](/errors/amount_below_minimum) | No        | Below the route's floor                                      |
| [`amount_above_maximum`](/errors/amount_above_maximum) | No        | Above a provider or compliance ceiling                       |
| [`underpaid`](/errors/underpaid)                       | No        | Less arrived than required. Your policy decides what happens |
| [`overpaid`](/errors/overpaid)                         | No        | More arrived. Excess refunded automatically                  |

## Routing and liquidity

| Code                                                       | Retryable | Summary                                         |
| ---------------------------------------------------------- | --------- | ----------------------------------------------- |
| [`insufficient_liquidity`](/errors/insufficient_liquidity) | Yes       | No provider can fill this route right now       |
| [`rail_unavailable`](/errors/rail_unavailable)             | Yes       | Rail not accepting traffic in this direction    |
| [`quote_expired`](/errors/quote_expired)                   | No        | Re quote and accept again                       |
| [`slippage_exceeded`](/errors/slippage_exceeded)           | Yes       | Would have delivered below the guaranteed floor |
| [`provider_error`](/errors/provider_error)                 | Yes       | Upstream provider failed                        |

## Destination

| Code                                                     | Retryable | Summary                                  |
| -------------------------------------------------------- | --------- | ---------------------------------------- |
| [`invalid_destination`](/errors/invalid_destination)     | No        | Failed validation before any money moved |
| [`destination_not_ready`](/errors/destination_not_ready) | Yes       | Valid, but cannot receive yet            |
| [`payout_undeliverable`](/errors/payout_undeliverable)   | No        | Destination rejected the settlement      |
| [`refund_undeliverable`](/errors/refund_undeliverable)   | No        | Refund failed. Always needs a human      |

## Compliance

| Code                                                 | Retryable | Summary                        |
| ---------------------------------------------------- | --------- | ------------------------------ |
| [`compliance_hold`](/errors/compliance_hold)         | No        | Held for review. Not a failure |
| [`compliance_rejected`](/errors/compliance_rejected) | No        | Cannot proceed. Funds refunded |

## Service

| Code                                                 | Retryable | Summary                             |
| ---------------------------------------------------- | --------- | ----------------------------------- |
| [`network_error`](/errors/network_error)             | Yes       | Transport failure. No state changed |
| [`service_unavailable`](/errors/service_unavailable) | Yes       | Temporary interruption on our side  |