easySales Blog — updates, guides and eCommerce news
Articles, guides, and announcements about marketplace integrations, automation, logistics, and online-shop marketing.
GPSR: what data every online offer has to carry
The GPSR is the EU general product safety regulation. See who it applies to and what data every online offer has to carry.
DAC7: what data platforms report about their sellers
DAC7 places the reporting duty on platform operators, not on sellers. What reaches the Polish revenue head, when it happens, and what follows from it.
EAN code: what it is, where to get one, when it is required
An EAN code is the bars; a GTIN is the digits — and the digits decide whether your offer links to the catalogue. The number's structure, the GS1 rules, what eac...
Proforma invoice: what it contains and why KSeF skips it
A proforma invoice announces a transaction but is not an invoice under Polish VAT law. What it contains, when to issue it, and why it stays outside KSeF.
How to start with KSeF: access, permissions, first invoice
How to start with KSeF step by step: choosing a credential, ZAW-FA, permissions, and a test send before the first real invoice.
Advance payment invoice: deadline and contents
An advance payment invoice documents money that arrived before delivery. Here is the deadline, the required contents, the final-invoice rule and the KSeF marker...
Dropshipping: how it works and what you answer for
Dropshipping is a model where the supplier ships straight to the buyer. See how it works, whether it is lawful, and which duties stay with you.
The KSeF certificate: type 1 and type 2, how to get one and when you need it
Type 1 signs you in, type 2 marks offline invoices — one certificate will not do both. How to obtain one, whose data it carries, and when it is genuinely requir...
The offline24 mode in KSeF: what the “24” means and how to issue an invoice
Under offline24 you issue the invoice electronically and transmit it later. What the “24” means, why the P_1 date governs, and how many QR codes an offline invo...
A KSeF failure: identifying the mode and counting the deadline
The Ministry announces a KSeF failure — an error in your own software is not one. How to identify the mode, count the deadline and build the retry queue.
The KSeF number: what it is, what it contains and where to find it
KSeF assigns the number once it accepts the invoice, and the UPO returns it. Where to find it, how it differs from your own invoice number, and what to do when...
Order management software: flat fee or per-order commission
Order management software bills either a flat fee or a per-order commission. One piece of arithmetic separates them — work out your cost before growth multiplie...