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

# Acknowledge Payment

This endpoint acknowledges the receipt and successful validation of a **payment** made against a loan. It is typically called by the platform, servicer, or payment processor after confirming the associated transaction on-chain or via off-chain reconciliation mechanisms.

## What it does

* Confirms that a previously submitted **payment** has been received and verified
* Logs the **payment confirmation** for audit and recordkeeping
* Advances the loan status in the **payment lifecycle**

## When to use it

* After verifying a **payment** via blockchain event or payment gateway
* To ensure that the payment tied to a specific **reference ID** is officially recorded
* Before moving forward with next steps like **closing the loan** or triggering **payment-related notifications**

## Request Body

The request body must include the loan identifier and the **payment reference ID**:

```json theme={null}
{
  "loanId": "0x5a0c0663a48e3abf16c7f0ee632b57da833e44e02a290fc0920ea2858da31f73",
  "refId": "REF123"
}
```

* `loanId`: The unique identifier of the loan.

* `refId`: The reference ID used in the original repayment transaction (loan-repay).

## Response

* Returns a success confirmation with the blockchain transaction hash:

```json theme={null}
{
  "transactionHash": "0x5a0c0663a48e3abf16c7f0ee632b57da833e44e02a290fc0920ea2858da31f73"
}
```