easySales Blog — updates, guides and eCommerce news
Articles, guides, and announcements about marketplace integrations, automation, logistics, and online-shop marketing.
Product Updates September 2026
In September we released more than 60 updates in easySales. The biggest are 14 new marketplace channels, among them MediaMarkt Poland, bol.com, Leroy Merlin and...
KSeF permissions: who grants them, to whom and how far
KSeF permissions decide who may issue and who may see an invoice on your company's behalf. Includes a decision table by legal form and role.
Allegro fees: how the commission is calculated
Allegro's sales commission is one line out of eight kinds of charge. How the base is built, when delivery enters it, why the bill counts cycles rather than mont...
How to sell on OLX: account, listing and Przesyłka OLX
How to sell on OLX from the seller's side: the account, the listing, the charges, Przesyłka OLX, the transaction deadlines and how the money arrives.
KSeF token: what it is, how to generate it, how long it lasts
A KSeF token is an authentication method that carries its own scope of permissions. When you need one, how to generate and name it, how it differs from a certif...
KSeF invoice visualisation: what it is and what it must show
A KSeF invoice visualisation is the readable form of a structured invoice, not a second document. When you may generate one, what has to match the XML file, and...
How to sell on Allegro: a guide for a new seller
How to sell on Allegro from the first click: which account type to pick, what Allegro checks at registration, how to build an offer, which fees accrue without a...
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.