# Invoice Cancellation Functionality

The XPOS system implements invoice cancellation in accordance with fiscal requirements by issuing corresponding refund invoices rather than deleting or modifying existing invoices.

### Cancellation Method

- Normal Sale invoices are cancelled by issuing a **Normal Refund** invoice.
- Advance Sale invoices are cancelled by issuing an **Advance Refund** invoice.

Steps on performing a refund can be found here: [https://learn.defy.com.fj/books/xpos-confidence-at-every-checkout/page/sales-return](https://learn.defy.com.fj/books/xpos-confidence-at-every-checkout/page/sales-return)

### System Behavior

- When a user selects the **Cancel** option on an invoice, XPOS automatically generates the appropriate refund invoice (Normal Refund or Advance Refund).
- The generated refund invoice mirrors the original invoice, including all key components (items, amounts, taxes), ensuring full traceability.

### Special Field Handling

- **Buyer ID Field:** Automatically populated with the Taxpayer Identification Number (TIN) of the seller.
- **Reference Number Field:** Automatically populated with the SDC Number of the original Sale invoice being cancelled.

### Data Integrity & Compliance

- Original invoices are retained and cannot be edited or deleted after fiscalization.
- Each cancellation is recorded as a separate fiscal transaction (refund invoice).
- Refund invoices are linked to the original sale invoice via the reference number.
- All cancellation actions are included in reports and audit logs.

### Access Control

- Only authorized users can perform invoice cancellations.
- All cancellation actions are logged with user and timestamp details.

### Compliance Statement

XPOS fully complies with the requirement that invoice cancellation must be performed through the issuance of corresponding refund invoices, ensuring auditability, traceability, and data integrity at all times.