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

# GET /transaction/{id}/receipt — Generate receipt

> Generate a compliance receipt for a completed transaction. Use merchant format for customer receipts, audit for full records, or pos for minimal raw-cent POS output.

Every completed transaction can produce a compliance receipt on demand. Receipts include state-mandated rounding disclosure language — for example, Washington SHB 2334 requires explicit disclosure of any rounding applied to a cash transaction. You choose the format based on who the receipt is for: customer-facing receipts use `merchant` format, internal compliance audits use `audit` format, and POS systems that render their own receipt UI use `pos` format for raw data without any markup.

## Endpoint

```
GET https://api.centsless.org/api/v1/transaction/{id}/receipt
```

## Authentication

<ParamField header="x-api-key" type="string" required>
  Your merchant or partner API key.
</ParamField>

## Path parameter

<ParamField path="id" type="string" required>
  The ID of the transaction to generate a receipt for (e.g., `TXN-2026-04-14-A82C2EAA`).
</ParamField>

## Query parameter

<ParamField query="format" type="string" default="merchant">
  Receipt format. One of:

  * `merchant` (default) — Customer-facing receipt with rounding disclosure language as required by state law.
  * `audit` — Full audit receipt including the hash chain position, audit hash, and fraud score.
  * `pos` — Minimal format with raw cent values only, for POS systems that render their own receipt layout.
</ParamField>

## Example

```bash theme={null}
curl "https://api.centsless.org/api/v1/transaction/TXN-2026-04-14-A82C2EAA/receipt?format=merchant" \
  -H "x-api-key: YOUR_API_KEY"
```