Concepts
Background knowledge on invoicing, tax, document numbering, and compliance.
In this section
Browse the manual- What is an invoice?What an invoice is, what it is not, and what makes it different from a bill, receipt, quote, or statement.
- Quotes, invoices, and credit notesWhen to use each document type, how they relate to each other, and the lifecycle of a transaction from quote to payment to credit.
- Why invoice numbers must be sequentialWhy tax authorities require sequential invoice numbers, what happens when you skip a number, and how Pepper handles numbering.
- How payments workHow Pepper records and reverses payments, what partial payment means, and how payment status transitions work.
- EPC QR codesWhen Pepper prints an EPC QR code on an invoice PDF, what the code contains, and what it does not do.
- What Pepper calculates and what you set upChoose what a price includes, supply the tax treatment, and understand exact line calculations and saved tax choices.
- EU VATHow EU VAT works for sellers in the EU, how to set it up in Pepper, and what the product does and does not do for you.
- EU VAT reverse chargeHow the reverse charge mechanism works for B2B cross-border sales within the EU, and how to set it up in Pepper.
- UBL 2.1 XML exportWhat the Peppol BIS Billing 3.0 UBL export contains, what Pepper checks before it writes a file, and what the export does not do.
- Self-hosting and backupsWhat self-hosting means for your invoicing data, what you are responsible for, and how to protect your records.
Installing for the first time? Check your hosting, then follow the installation guide.