Festivalsku narukvicu i akreditaciju provjerava ulazna kontrola.

They are both direct objects of the verb provjerava (checks / is checking), so they appear in the accusative case.

• narukvica → narukvicu
• akreditacija → akreditaciju

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

The adjective also has to match the noun:

• festivalska narukvica → festivalsku narukvicu

So the whole object phrase is in the accusative.

Because Croatian word order is much more flexible than English word order.

In English, you would normally say:

• Entry control checks the festival wristband and accreditation.

In Croatian, it is also possible to say:

• Ulazna kontrola provjerava festivalsku narukvicu i akreditaciju.

The version with the object first:

• Festivalsku narukvicu i akreditaciju provjerava ulazna kontrola.

puts more focus on what is being checked. This kind of word order is very natural in Croatian when the speaker wants to highlight the object or when the object is already the topic of the conversation.

We know from the case endings.

• ulazna kontrola is in the nominative, which is the usual case for the subject.
• festivalsku narukvicu and akreditaciju are in the accusative, which marks the direct object here.

So even though ulazna kontrola comes last, it is still the subject.

This is one of the big differences from English: in Croatian, word order alone does not determine who is doing the action.

Because the verb agrees with the subject, not with the objects.

The subject is:

• ulazna kontrola = singular

So the verb is also singular:

• provjerava = checks / is checking

It does not become plural just because there are two objects:

• festivalsku narukvicu
• i akreditaciju

If the subject were plural, then the verb would be plural too, for example:

• Ulazne kontrole provjeravaju festivalsku narukvicu i akreditaciju.

Because adjectives in Croatian must agree with the noun in:

• gender
• number
• case

The noun is:

• narukvicu = feminine singular accusative

So the adjective must match:

• festivalsku = feminine singular accusative

Compare:

• festivalska narukvica = nominative
• festivalsku narukvicu = accusative

So the adjective changes because the noun changes case.

Yes, absolutely.

That version is more neutral and may feel closer to English word order:

• Ulazna kontrola provjerava festivalsku narukvicu i akreditaciju.

The original sentence:

• Festivalsku narukvicu i akreditaciju provjerava ulazna kontrola.

is also correct, but it gives more emphasis to the items being checked.

Both are grammatical. The difference is mainly one of focus and information structure, not basic meaning.

Literally, it means something like entrance control or entry control.

In context, it usually refers to:

• the checkpoint at the entrance,
• the security staff,
• or the admission check process.

So depending on context, a natural English translation might be:

• Entry control checks...
• Security at the entrance checks...
• The entrance staff check...

Croatian often uses expressions like this a bit more abstractly than English.

Here, akreditacija usually means some kind of accreditation pass, credential, or badge that gives someone access to the event.

At a festival, it often refers to:

• a staff pass
• a media pass
• a VIP credential
• an official access badge

So it is not just the abstract idea of accreditation; it often means the actual document or pass being checked.

Provjerava is the 3rd person singular present tense of the imperfective verb provjeravati/provjeravati? In standard usage, the present form used here is from provjeravati or the imperfective pair with provjeriti, but in everyday practical terms, learners usually just need to know that provjerava means checks / is checking.

In this sentence, it sounds like a general procedure or an ongoing action:

• The entrance control checks the wristband and accreditation.

A form like provjeri would usually be connected with a different structure, such as:

• a command,
• a future-like meaning in some subordinate clauses,
• or a perfective verb form in a different context.

So provjerava is the natural choice for describing what happens at the entrance.

Yes.

It connects the two objects:

• festivalsku narukvicu
• akreditaciju

So:

• festivalsku narukvicu i akreditaciju = the festival wristband and accreditation

Both things are being checked by the same subject.

Yes.

Croatian present tense often covers both:

• checks
• is checking

So provjerava can mean either:

• Entry control checks the festival wristband and accreditation
  or
• Entry control is checking the festival wristband and accreditation

Which English version is best depends on context:

• for a general rule or procedure: checks
• for something happening right now: is checking