Služba za izgubljeni prtljag proverava kartu za ukrcavanje, potvrdu i odredište.

Because those nouns are the direct objects of proverava.

The verb proveravati / proverava means to check / is checking, so the things being checked go into the accusative case.

• karta → kartu
• potvrda → potvrdu

Both karta and potvrda are feminine nouns ending in -a, so in the singular accusative they usually change -a to -u.

So:

• proverava kartu = checks the ticket/card
• proverava potvrdu = checks the confirmation/document

It is in the accusative already — it just happens to look the same as the nominative.

Odredište is a neuter noun. For many neuter singular nouns in Serbian, nominative and accusative have the same form.

So:

• nominative: odredište
• accusative: odredište

That is why it does not visibly change, even though grammatically it is functioning as a direct object just like kartu and potvrdu.

Služba za izgubljeni prtljag is a noun phrase meaning something like lost luggage service / lost baggage office / lost and found for baggage.

Here za means for in the sense of intended for / dealing with.

So the structure is:

• služba = service, office, department
• za = for
• izgubljeni prtljag = lost luggage

This is a very common Serbian pattern:

• centar za informacije = information center
• soba za sastanke = meeting room
• karta za ukrcavanje = boarding pass, literally card for boarding

So za does not always mean exactly the same thing in English; its meaning depends on the phrase.

Because the adjective has to agree with the noun.

Prtljag is a masculine singular noun, and here the adjective is in the form that matches it: izgubljeni.

In this phrase, izgubljeni is the definite adjective form, which is very common in set expressions and official-style phrases.

So:

• izgubljeni prtljag = lost luggage

A learner does not need to overthink this too early; the important point is that adjectives in Serbian agree with the noun in:

• gender
• number
• case

Here the phrase is fixed and natural as izgubljeni prtljag.

Literally, it means card/ticket for boarding.

Breakdown:

• karta = card, ticket, pass
• za = for
• ukrcavanje = boarding

So karta za ukrcavanje is the normal Serbian way to say boarding pass.

This is a good example of how Serbian often builds practical travel vocabulary with noun + za + verbal noun.

Ukrcavanje is a verbal noun — a noun made from a verb.

It comes from the verb ukrcati se / ukrcavati se, meaning to board.

So:

• ukrcati se = to board
• ukrcavanje = boarding

This is very common in Serbian. English does something similar with boarding, checking, loading, and so on.

In the phrase karta za ukrcavanje, the noun ukrcavanje means the action/process of boarding.

Proverava is present tense, third person singular.

Its basic meaning is:

• he checks
• she checks
• it checks
• or more generally checks / is checking

Since the subject is služba and služba is singular, the verb is singular too:

• Služba ... proverava ...

In context, Serbian present tense can often correspond to English:

• checks
• is checking
• sometimes even does check, depending on the situation

Because the grammatical subject is služba, and that noun is singular.

Even if the idea behind it is a department or group of employees, Serbian agrees with the noun actually used in the sentence.

So:

• služba = singular noun
• proverava = singular verb form

This is similar to English sentences like:

• The office checks your documents.
• The department verifies your information.

Yes, very much.

Prtljag is usually treated as a mass/collective noun, much like luggage or baggage in English, rather than as a simple countable noun like bag or suitcase.

So:

• prtljag = luggage/baggage
• kofer = suitcase

That is why izgubljeni prtljag sounds like lost luggage, not a lost bag.

Because Serbian has no articles.

English uses:

• a
• an
• the

Serbian does not. So whether something is understood as a service, the service, a confirmation, or the confirmation depends on context.

That means a Serbian sentence can often look shorter than the English equivalent.

For example:

• Služba proverava kartu.

Depending on context, that could mean:

• The service checks the boarding pass
• A service checks a pass
• The office is checking the pass

Yes, Serbian word order is relatively flexible, although some orders sound more neutral than others.

The given sentence is a normal, neutral order:

• Služba za izgubljeni prtljag proverava kartu za ukrcavanje, potvrdu i odredište.

You could move things around for emphasis, but the original is the most straightforward for standard explanation or narration.

For example, Serbian can front an object for emphasis, but that would change the focus:

• Kartu za ukrcavanje, potvrdu i odredište proverava služba za izgubljeni prtljag.

That is still grammatical, but less neutral. A learner should usually stick with the original order until they are comfortable with Serbian emphasis patterns.

Potvrda has a wider meaning than just one English word.

Depending on context, it can mean:

• confirmation
• receipt
• certificate
• proof
• document confirming something

In an airport-type context, it may refer to some kind of confirmation or supporting document.

So the exact English translation depends on the situation, but the Serbian word itself is broad and useful.

It can be either, depending on context.

Proveravati / proveriti generally means:

• to check
• to verify
• to inspect

In everyday situations, checks is often the best default translation. In more formal contexts, verifies may fit better.

So in this sentence, proverava suggests that the service/office is examining those documents or details to make sure everything matches.

Yes. Proverava comes from the imperfective verb proveravati.

Very roughly:

• proveravati / proverava = to be checking, to check regularly, to check as a process
• proveriti = to check/verify once, to complete the check

In a plain informational sentence like this, proverava is natural because it describes what the office does.

You might see a perfective form in a different context, for example:

• Služba će proveriti dokumenta. = The office will check the documents.

So the difference is mainly about process/habit versus completed action.