# Collection

Frequently asked questions about the collection (Safepay) function.

## Is there a minimum amount limit for collection?

**No hard limit**.

However, it is recommended to set a reasonable minimum amount because blockchain transfers have Gas fees, and small payments may not be cost-effective.

| Network  | Recommended Minimum |
| -------- | ------------------- |
| TRON     | 1 USD               |
| Ethereum | 10 USD              |
| Arbitrum | 1 USD               |

## What to do if order fails?

{% stepper %}
{% step %}

#### Check Failure Reason

Check order details in the admin dashboard to understand the failure reason.
{% endstep %}

{% step %}

#### Handle Exception Order

**Payment Timeout**: User can initiate payment again **Amount Mismatch**: User needs to pay again with the correct order amount **On-chain Failure**: Check wallet authorization or network status
{% endstep %}

{% step %}

#### Re-initiate

After handling the exception order, the original order number cannot be reused. A new order needs to be created.
{% endstep %}
{% endstepper %}

## Which is better, TRC20 or ERC20?

| Comparison | TRC20          | ERC20              |
| ---------- | -------------- | ------------------ |
| Fees       | Low (\~1 TRX)  | High ($0.1-$5)     |
| Speed      | Fast (3 sec)   | Slow (15-30 sec)   |
| Ecosystem  | TRON ecosystem | Ethereum ecosystem |

**Recommendations**:

* Large payments: Recommend TRC20 (low fees)
* Need Ethereum ecosystem: Use ERC20

## How long does it take for funds to arrive after user pays?

| Network  | Confirmation Time          |
| -------- | -------------------------- |
| TRON     | \~3 sec (1 confirmation)   |
| Ethereum | \~1 min (12 confirmations) |
| Arbitrum | \~1-3 min (1 confirmation) |

{% hint style="info" %}
**Arrival Standard**: Funds are considered arrived after blockchain confirmation. BlockATM will immediately update order status and send Webhook notification.
{% endhint %}

## Can I issue refunds?

BlockATM, as a payment channel, does not provide automatic refund functionality.

**Solutions**:

* Manual refund through admin dashboard (withdraw from contract and return to user)
* Or use payout function to refund to user

## What to do if Scan2Pay amount is entered incorrectly?

Scan2Pay requires the user to pay exactly the same amount as the order amount.

**Consequences of Amount Mismatch**:

* Order cannot be automatically matched
* Funds may be lost

**Recommendations**:

1. Prompt user to confirm amount before payment
2. If user enters wrong amount, contact technical support

## How to view collection records?

1. Login to BlockATM admin dashboard
2. Go to "Collection" → "Order List"
3. Filter by time, status, order number, etc.

Or query via API:

```
GET /order/api/v2/payorder/list
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.blockatm.net/faq/collect.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.