Guides
Can you cancel an electronic VAT invoice in Vietnam? How to correct it
Can you cancel an issued VAT invoice in Vietnam? Learn when to notify, adjust or replace an electronic invoice, and how Invoi simplifies the process.
Invoi Blog
Guides, news and know-how about e-invoicing for Vietnamese businesses.
Latest articles
Guides
Should your accountant manage all your invoices? Why business owners need visibility and control
Discover why business owners and accountants should work in one shared workspace to manage invoices, share information and maintain control over business finances.
Guides
When should you issue a VAT invoice in Vietnam? Before or after payment?
When should you issue a VAT invoice in Vietnam? Learn the latest rules for goods, services, advance payments, deposits and milestone-based contracts.
Guides
Payment terms in quotations: How to set clear expectations with clients
Learn how to write clear payment terms in quotations, from upfront deposits to milestone payments, with practical examples for service businesses.
Guides
What is a USB token? Do you need one for e-invoicing in Vietnam?
Learn about USB tokens, Vietnam's digital-signature rules, device limitations, and invoi.vn's built-in HSM eSignature at no additional charge.
Guides
What is a quotation? How is it different from a VAT invoice?
Learn what a quotation is, how it differs from a VAT invoice, what to include, and how clear payment terms and QR codes can make business transactions easier.
Guides
What is an e-invoice? A guide for businesses in Vietnam
Learn what e-invoices are in Vietnam, when to issue them, how tax authority transmission works, how to register, and how to choose compliant e-invoicing software.
Guides
How to choose e-invoicing software for your business
Learn how to choose e-invoicing software for your business, from legal compliance and digital signatures to ease of use, accountant collaboration and pricing.
About us
How we named and designed invoi
Discover the story behind Invoi’s name and design, inspired by the belief that business software should be simple, intuitive, and easy to use.