Konsument wysyła numer zamówienia i potwierdzenie zamówienia.

Polish does not have articles. So konsument can mean a consumer or the consumer, depending on context. The same is true for numer zamówienia and potwierdzenie zamówienia.

English must choose between a/an and the, but Polish usually leaves that information to context.

Wysyła is the 3rd person singular present form of the verb wysyłać.

So it agrees with the singular subject konsument:

• ja wysyłam = I send / am sending
• ty wysyłasz = you send / are sending
• on/ona/ono wysyła = he/she/it sends / is sending

Because wysyłać is imperfective, wysyła can mean either:

• sends
• is sending

The exact English translation depends on context.

Because the subject is only Konsument, and that noun is singular.

The two things after the verb — numer zamówienia and potwierdzenie zamówienia — are the objects of the sentence, not the subject.

So the structure is:

• Konsument = subject
• wysyła = singular verb
• numer zamówienia i potwierdzenie zamówienia = two objects

They are direct objects, so they are in the accusative case. But in this sentence, their accusative forms happen to look the same as their dictionary forms.

Why?

• numer is a masculine inanimate noun, and in the singular its accusative is the same as its nominative
• potwierdzenie is a neuter noun, and in the singular its accusative is also the same as its nominative

So although the case has changed grammatically, the visible form has not changed.

Because both phrases mean something of the order:

• numer zamówienia = the order number / literally number of the order
• potwierdzenie zamówienia = the order confirmation / literally confirmation of the order

After many nouns, Polish uses the genitive to show this of relationship.

Here:

• dictionary form: zamówienie
• genitive singular: zamówienia

So zamówienia is not the main object of the verb. It depends on the nouns numer and potwierdzenie.

In this sentence, it is understood as genitive singular, not plural.

That is because the structure is:

• numer zamówienia = number of the order
• potwierdzenie zamówienia = confirmation of the order

It would be grammatically possible for zamówienia to be a plural form in other contexts, because some Polish endings overlap. But here the meaning and the noun phrases clearly point to singular.

Normally, you would keep it.

So:

• numer zamówienia i potwierdzenie zamówienia is clear and standard

If you removed the second one, the phrase could sound incomplete or less precise. Repeating it makes it clear that both:

• the number belongs to the order, and
• the confirmation also belongs to the order

This is especially natural in formal, administrative, or instructional language.

Yes. Polish word order is more flexible than English because case endings help show grammatical relationships.

The sentence as written:

• Konsument wysyła numer zamówienia i potwierdzenie zamówienia.

This is a neutral, straightforward order.

But other orders are possible for emphasis, for example:

• Numer zamówienia i potwierdzenie zamówienia wysyła konsument.

That version puts more focus on what is being sent. It is grammatical, but less neutral.

Not exactly.

• konsument = consumer
• klient = customer/client

Konsument often sounds more formal or legal, especially in rules, regulations, forms, and official instructions.

So in a sentence like this, konsument is very natural if the context is official or procedural.

A very common perfective partner of wysyłać is wysłać.

So:

• wysyła = imperfective present, often sends / is sending
• wyśle = perfective future, often will send

A perfective version could be:

• Konsument wyśle numer zamówienia i potwierdzenie zamówienia.

That would suggest a single completed future action: The consumer will send the order number and the order confirmation.