Knowledge Base

Invoicing

Online invoices, QR payments, PDF, XML, and sending workflows.

Invoicing and QR payments

From company profile through PDF output to QR payment and payment follow-up.

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invoiceSlovakiaPDFXML

How to issue an online invoice in Slovakia

A practical overview of what to prepare before issuing an invoice in Slovakia.

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QR paymentPAY by squareIBAN

How QR payment on an invoice works

QR payment reduces manual entry and makes invoice payment faster.

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Online invoice with QR payment for sole traders

A practical workflow for sole traders who need to issue an invoice, add QR payment, and keep accounting records.

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Numbering invoices, proformas, advances, and credit notes

Many invoicing questions start with numbering. Not every document should share the same sequence as a final invoice.

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recurring invoicemonthly invoiceschedulesubscription

Recurring invoices: how to schedule repeats without automatic mistakes

A recurring invoice should save time, but not issue a wrong document without review.

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invoice requirementsVATcompany IDtax IDSlovakia

Mandatory invoice details in Slovakia: a practical checklist

An invoice is not just a nicely designed PDF. It must contain data that an accountant, customer, and tax review can verify.

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Excel invoice importbulk invoicesinvoice draftscolumn mapping

Excel invoice import: why it should create drafts, not final invoices

Excel import saves time for repeated or bulk invoices, but it needs a review step.

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