Point of Sale: Creating and Signing Invoices
The Point of Sale screen is a complete, working Point of Sale System built into XPOS ESDC — useful on its own, or as a reference for what a real integration does behind the scenes (see Integrating XPOS ESDC with Your POS if you're building your own).
Creating an invoice
Fill in the Invoice card:
| FieldNotes | |
| Invoice type | Normal (a regular sale), Advance (deposit/advance payment), Training, Copy, or ProForma. |
| Transaction | Sale or Refund. |
| Payment | How the customer paid (cash, card, etc.). |
| Cashier | Defaults to whatever you set in Settings → Behavior → Default cashier. |
| Buyer ID / Cost center | Optional — fill in if your business tracks these. |
Refunds and Copies require a referent document — the invoice you're refunding or copying. Click Pick past invoice… to search recent invoices instead of typing the number by hand.
Adding items
Each row needs a name, quantity, unit price, and a tax label (from your current tax rates — see Settings Reference). Prices are VAT-inclusive. GTIN/barcode is optional — click the small GTIN toggle next to a row to add one; leave it blank if your business doesn't use barcodes.
Copy mode
Set Invoice type to Copy and pick the invoice to copy — item entry is replaced with a single "reproduce this invoice" action. Signing reissues the same items, taxes and payment as a fiscal Copy and prints its receipt.
Signing
Once everything looks right, sign the invoice. If the card's PIN hasn't been verified yet this session, you'll be prompted first. On success, the receipt is generated and (if Automatically open the receipt after signing is on in Settings) opens automatically.
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Upload: a signed receipt (the Journal/Receipt popup), showing the fiscal QR code, MRC/invoice number and totals.
Signing without internet
Signing an invoice is a local operation between XPOS ESDC and your Secure Element card — it does not require an internet connection. You can keep creating and signing invoices normally while offline. Behind the scenes, each signed invoice is queued for audit submission to TaxCore and sent automatically once connectivity returns (see Audit & Reset for how the audit queue and offline capacity work).