# Pattern 1: Point-of-Sale + Digital Receipts

<figure><img src="/files/ktuBPp4Pj01CkzpsZsuo" alt=""><figcaption></figcaption></figure>

**What Connects:** Your **existing POS system → Blockchain verification layer → Permanent receipt records**

**How It Works:**

1. Transaction completes in your POS (exactly as it does now)
2. POS sends **transaction details to blockchain** adapter via API:
   * Transaction ID
   * Date/timestamp
   * Items purchased
   * Total amount
   * Store location
   * Customer ID (if loyalty member)
3. Blockchain adapter creates **complete digital receipt record** with cryptographic verification (selected receipt data, excluding PII). (<1 second, <$0.001 cost)
4. Blockchain **transaction ID returns to POS**
5. Customer receives **QR code (printed, SMS, email, or app) linking to blockchain record**

**Customer Experience:**

* **Scan QR code** with phone
* Retrieve complete digital receipt **directly from blockchain**
* **Verify transaction happened at specific time** with cryptographic proof
* **Access receipt anytime** (never fades, never lost)
* **Automatic warranty registration**
* **Instant loyalty point confirmation**

**Integration Complexity: Low**

* **POS system adds:** API call after transaction (minimal code)
* **Blockchain adapter**: Provided by solution vendor
* **Typical integration time:** 2-4 weeks for pilot store, 2-3 months full rollout

**Integration Requirements:**

* **Modern POS** with API capability (most systems since 2015+)
* **Network connectivity** to blockchain adapter
* **QR code generation capability**
* **Customer notification method** (SMS, email, or app)

**Business Value:** **Eliminate the vast majority of receipt-related service costs** with 2-4 week integration effort.


---

# 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://hub.bsvblockchain.org/higher-learning/bsv-academy/blockchain-solutions-for-retail-trust-and-transparency/integrating-blockchain-with-your-existing-retail-systems/pattern-1-point-of-sale-+-digital-receipts.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.