Overview
In Portugal, strict fiscal regulations require businesses to issue certified invoices for every transactions—whether online or in person.
InvoiceExpress is a government-certified invoicing platform used to issue legal invoices that comply with the rules set out by the Portuguese Tax Authority. These include:
Correct use of tax codes
Proper invoice sequencing
Collection of customer tax identification numbers (NIFs)
Automatic communication of each issued invoice to the Portuguese Tax Authority (Autoridade Tributária)
When connected with Ventrata, InvoiceExpress allows sellers to automatically issue compliant invoices at the time of booking, saving time and ensuring legal accuracy.
📗 TIP
Learn more about InvoiceXpress.
InvoiceXpress Document Types
InvoiceXpress issues three types of documents:
Invoice (Fatura)
A fiscal document stating the product sold and the amount charged. |  |
Receipt (Recibo)
A fiscal document confirming that the transaction was completed. |  |
Credit Note (Nota de Crédito)
A fiscal document indicating that the original invoice was voided.
📒 NOTE Any time the booking is updated, including customer information, the original invoice is voided and a new invoice is generated with the updated information.
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Each document includes details that tie the Ventrata booking and customer to the InoviceXpress document.
V/ Ref. - must match the Ventrata order reference
Contributor (Contribuinte) - the customer's tax ID (NIF), if provided and valid
 InvoiceExpress Invoice |
 Ventrata Booking Level - Order Reference |
 Ventrata Backoffice Checkout - Tax ID |
Link InvoiceXpress with Ventrata
Prerequisites:
Create and set up an InvoiceXpress account
Configure your ATCUD (Código de Validação e Numeração Sequencial de Documentos - a unique document validation and numbering code)
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A banner on every page of your InvoiceXpress account prompts you to configure an ATCUD. Follow the steps in the app.
Generate an API key in InvoiceExpress, see below
Set up tax rates in InvoiceXpress
Create the corresponding tax rates in your Ventrata dashboard
Generate API key in InvoiceXpress
Generate API key in InvoiceXpress
In your InvoiceXpress account, go to My profile.
My profile
Under Integrations in the right-hand navigation, select API.
Integrations - API
Press the Generate API Key button.
Generate API Key
Copy the following details:
Account Name
API Key
Account Name & API Key
📒 NOTE
You need this information to create a connection between InvoiceXpress and Ventrata.
Create InvoiceXpress Registry in Ventrata
Create InvoiceXpress Registry in Ventrata
In the Ventrata dashboard, go to Supplier Settings > Registries.
Registries
Press the + New Registry button.
New Registry
Select the 'InvoiceXpress' option.
InvoiceXpress
Enter a name for the registry.
Name
(Optional) Select one or more destination(s) if you are using destinations.
Destinations
Paste your 'Account Name' and 'API Key' as copied from InvoiceExpress.
Account Name & API Key
Press the Create Invoice Xpress Registry button to save your settings.
Create Invoice Xpress Registry