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

# 5xx — Server Errors

> When to retry Dollr API server errors and what to send support.

**5xx** responses indicate an unexpected problem on Dollr or an upstream provider. Your request may or may not have been processed.

## The problem

Ambiguous outcomes after `POST /v1/executions/*` are the highest risk: you might double-charge if you retry blindly.

## Solution

<Steps>
  <Step title="For executions — poll first">
    If you stored `reference_id`, call `GET /v1/status/collection/:reference_id` (or payout/transfer/refund) before retrying execute.
  </Step>

  <Step title="Retry with backoff">
    For idempotent **reads** and safe retries, use exponential backoff (1s, 2s, 4s… capped).
  </Step>

  <Step title="Escalate if persistent">
    Email [dev@heydollr.app](mailto:dev@heydollr.app) with `reference_id`, UTC timestamp, endpoint, and redacted bodies. See [Support checklist](/reference/support).
  </Step>
</Steps>

## Related

* [Error handling](/guides/error-handling)
* [Duplicate reference\_id](/knowledge-base/duplicate-reference-id)
* [Status & incidents](/reference/status-and-incidents)