---
title: "How It Works"
slug: "how-it-works"
updated: 2024-04-08T13:24:39Z
published: 2024-04-08T13:24:39Z
canonical: "docs.blackthorn.io/how-it-works"
---

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

# How It Works

**Existing PayLink Customers**

          

If you used PayLink prior to the upgrade, click [here](/v1/docs/upgrade).

## Charge Transaction

When you create a Transaction, a unique PayLink is generated. *This link can be emailed manually or automatically to your customer for payment. See our [Use Cases](/v1/docs/use-cases) for specific examples.*

- `PayLink Configuration` field *Either set manually or if you have a default PayLink configuration record, it will be set automatically.* ![L_03_how it works 1](https://cdn.document360.io/f977eec0-500f-40a3-b663-724a51f78075/Images/Documentation/L_03_how%20it%20works%201.png)
- There are **five fields** that populate onto the PayLink Screen: `Amount`, `Currency`, `Contact` or `Account`, `Due Date`, and `Description` from the Transaction record.

          **Multiple Payment Gateways**

          

Enter a value in `Payment Gateway` before saving. *PayLink will use the default Payment Gateway if that field is empty.*

## Payment Process

When your customer receives the PayLink, they will:

- Select "Pay" in the top right corner.
- Enter their Payment Method and click **Pay**. (By default, a postal code is only required for users from the USA and Canada. It is optional for all other countries.)
- Review and accept the Terms and Conditions.
- Download their receipt (printer icon).  

*If you enabled [Email Receipts](/v1/docs/email-receipts), they will receive a receipt too.*

          **Pay Button**

          

Uses Stripe.js to collect card information from the user and stays **PCI compliant**. Learn more about [Stripe.js](https://stripe.com/docs/stripe-js)

## Next Steps

- [Completed Card Transaction](/v1/docs/card)
- [Completed ACH Payment](/v1/docs/ach)