Konsument dostanie zwrot pieniędzy, gdy odeśle towar.

Because konsument is the subject of the sentence, so it is in the nominative case.

• konsument = consumer
• It is the person who will receive the refund.

If it were the object of another verb, the form might change, but here it stays in the basic dictionary form.

Dostanie means will get / will receive here. It is a future meaning.

That is because dostać is a perfective verb. In Polish, perfective verbs do not normally have a true present tense for ordinary actions. Their “present-looking” forms usually refer to the future.

So:

• dostaje = is getting / gets (from the imperfective dostawać)
• dostanie = will get (from the perfective dostać)

Because Polish often uses a perfective verb to express a single completed future action.

Here, the idea is that the consumer will receive the refund as one completed event. So dostanie is the natural choice.

Compare:

• Konsument dostanie zwrot pieniędzy = The consumer will get the refund.
• Konsument będzie dostawał pieniądze = The consumer will be receiving money / receive money repeatedly.

The second version would suggest repetition or an ongoing process, which does not fit as well here.

Zwrot pieniędzy is a noun phrase meaning refund or more literally return of money.

Grammatically:

• zwrot is the main noun
• pieniędzy depends on it and is in the genitive plural

So literally it is something like:

• zwrot = return
• pieniędzy = of money

This is a very common Polish structure: a noun followed by another noun in the genitive.

Because after zwrot, Polish uses the genitive:

• zwrot czego? = return of what?
• zwrot pieniędzy = return/refund of money

The basic form is:

• pieniądze = money

But in the genitive plural it becomes:

• pieniędzy

This is one of those case patterns you just have to get used to.

Yes, zwrot is the direct object, so it is in the accusative.
But for many masculine inanimate nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: zwrot
• accusative: zwrot

The case is there grammatically, even though the form does not change.

Yes, gdy and kiedy can both mean when in many contexts.

In this sentence:

• gdy odeśle towar = when they send the goods back

Gdy is a little more neutral or formal in many contexts, while kiedy is also very common and natural.

So this would also work:

• Konsument dostanie zwrot pieniędzy, kiedy odeśle towar.

Both are good Polish.

Because gdy odeśle towar is a subordinate clause. In Polish, subordinate clauses are normally separated by a comma.

So the structure is:

• main clause: Konsument dostanie zwrot pieniędzy
• subordinate clause: gdy odeśle towar

That is why the comma is required.

Odeśle is the correctly conjugated form here.

The infinitive is:

• odesłać = to send back

Its 3rd person singular form is:

• odeśle = he/she/it will send back

Why not odsyła?

• odsyła is from the imperfective verb odsyłać
• it usually means is sending back / sends back in a habitual or ongoing sense

Here the action is a single completed future event, so the perfective odeśle is preferred.

This is a very important feature of Polish aspect.

Odesłać is a perfective verb. Perfective verbs use present-tense endings, but the meaning is usually future.

So:

• odeśle literally looks like a present form
• but it means will send back

This is completely normal in Polish.

Both can involve sending something, but they are not the same.

• wysłać = to send
• odesłać = to send back

The prefix od- often adds the idea of moving away/back, so odesłać towar means returning the goods to the seller or sender.

So in a refund context, odesłać is the right choice.

Because towar is the direct object of odeśle, so it is in the accusative singular.

And again, because towar is a masculine inanimate noun, its accusative singular looks the same as the nominative singular.

So:

• nominative: towar
• accusative: towar

If it were in the genitive, then you would get towaru.

Not exactly, though they can overlap.

• towar = goods, merchandise, item being sold
• produkt = product

In a refund or return-policy context, towar is very common because it sounds like the item as merchandise in commerce. Produkt is also possible in some situations, but towar is especially natural in legal, retail, and customer-service language.

In principle, konsument is grammatically masculine. In general or legal language, Polish often uses masculine forms in a broad, generic sense.

If you specifically wanted to refer to a female consumer, you might say:

• konsumentka

But in formal or legal-style sentences, konsument is often used as the standard general term.

Yes, it sounds fairly neutral-to-formal, especially because of words like:

• konsument
• zwrot pieniędzy
• odeśle towar

This is the kind of Polish you might see in:

• store regulations
• customer service policies
• legal or commercial texts

In everyday speech, someone might say something a bit more conversational, for example with klient instead of konsument, depending on context.

Yes, Polish word order is flexible, although some orders sound more natural than others.

The original sentence is very natural:

• Konsument dostanie zwrot pieniędzy, gdy odeśle towar.

You could also say:

• Gdy odeśle towar, konsument dostanie zwrot pieniędzy.

This version puts more emphasis on the condition/time clause first. Both are correct.

It is mainly a time clause: when they send the goods back.

But in real usage, it can also feel a bit like a condition, because the refund happens only after that action is completed. In English, this often works similarly:

• The consumer will get a refund when they send the goods back.

So it expresses time, but with a practical conditional sense as well.

Sometimes yes, but the meaning shifts slightly.

• gdy = when
• jeśli = if

So:

• Konsument dostanie zwrot pieniędzy, gdy odeśle towar.
  = The consumer will get a refund when they send the goods back.

• Konsument dostanie zwrot pieniędzy, jeśli odeśle towar.
  = The consumer will get a refund if they send the goods back.

The first sounds like the return is expected as the moment that triggers the refund. The second emphasizes the condition more directly. Both can work, but gdy is slightly smoother in the original sentence.