Ukraden bicikl želim prijaviti u policijskoj postaji i potpisati zapisnik.

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

Starting with Ukraden bicikl puts that object in focus, as if saying:

• As for the stolen bicycle, I want to report it...

A more neutral, textbook-like order would be:

• Želim prijaviti ukraden bicikl u policijskoj postaji i potpisati zapisnik.

So the original sentence is not wrong; it just foregrounds the stolen bicycle.

No. The subject is understood from želim, which means I want.

So the structure is:

• (Ja) želim = I want
• ukraden bicikl = the direct object, the stolen bicycle

English speakers often expect the first noun to be the subject, but in Croatian that is not necessary.

Because bicikl is a masculine inanimate noun, and in Croatian the accusative singular of masculine inanimate nouns is the same as the nominative singular.

So:

• bicikl = nominative singular
• bicikl = accusative singular as well

That is why the direct object still looks like bicikl.

Compare:

• Vidim bicikl. = I see a bicycle.
• Vidim psa. = I see a dog.

With pas (an animate noun), the accusative changes to psa. With bicikl (inanimate), it does not.

Because u means in/at, and when it shows location, it takes the locative case.

The base form is:

• policijska postaja = police station

In the locative singular, it becomes:

• u policijskoj postaji = in/at the police station

So this is a location phrase, not a motion phrase.

Compare:

• u policijskoj postaji = at the police station
• u policijsku postaju = into the police station

Because after želim (I want), Croatian commonly uses the infinitive.

So:

• želim prijaviti = I want to report
• želim potpisati = I want to sign

When two actions share the same subject, Croatian can simply connect the infinitives with i:

• želim prijaviti ... i potpisati ...

This is very normal and natural.

Here prijaviti means to report.

In other contexts, prijaviti can also mean things like:

• to register
• to sign up
• to declare
• to report someone/something officially

But with a stolen bicycle and a police station, the meaning is clearly:

• to report the theft / report the stolen bicycle

A very common alternative in Croatian would be:

• prijaviti krađu bicikla = report the theft of the bicycle

Zapisnik is an official written record.

In a police context, it usually means something like:

• a report
• a written statement
• an official record

So potpisati zapisnik means to sign the official report/record.

It is not just a casual note; it is a formal document.

This is a common question.

Ukraden is a past passive participle used like an adjective, meaning stolen. Croatian has short and long adjective forms, and you may also see:

• ukraden bicikl
• ukradeni bicikl

Both can occur, and in modern everyday usage the difference is often not kept very strictly by all speakers.

Very roughly:

• ukraden = shorter form
• ukradeni = longer/definite form

In many real-life situations, a native speaker might actually prefer ukradeni bicikl, especially when referring to a specific bicycle. But ukraden bicikl is still understandable and grammatical.

In context, it most naturally applies to the whole situation.

So the listener will usually understand:

• I want to report the stolen bicycle at the police station
• and sign the report there as well

Grammatically, the phrase sits closest to prijaviti, but in normal interpretation it can easily cover both actions.

It is understandable and grammatically possible, but many native speakers might say it a bit differently.

More natural alternatives could be:

• Želim prijaviti ukradeni bicikl u policijskoj postaji i potpisati zapisnik.
• Želim u policijskoj postaji prijaviti ukradeni bicikl i potpisati zapisnik.
• Želim prijaviti krađu bicikla u policijskoj postaji i potpisati zapisnik.

The last version, with krađu bicikla (the theft of the bicycle), is especially natural in a police context.

Because Croatian does not have articles like English a and the.

So nouns such as:

• bicikl
• postaja
• zapisnik

can mean a bicycle, the bicycle, a report, or the report, depending on context.

The listener figures out the exact meaning from the situation, word order, and surrounding information.