Poslije prijave štete provjerite djelomičnu štetu.

Because poslije means after and it requires the genitive case.

The basic noun is prijava (report, application, claim, depending on context).
Its genitive singular form is prijave.

So:

• prijava = report / claim
• poslije prijave = after the report / after filing the claim

This is a very common pattern in Croatian:

• poslije ručka = after lunch
• poslije sastanka = after the meeting
• poslije prijave = after the report/claim

Here štete is also in the genitive singular.

The phrase prijava štete literally means report of damage or damage claim. In Croatian, when one noun describes another like this, the second noun is often put in the genitive:

• prijava štete = damage report / claim
• procjena štete = assessment of damage
• uzrok nesreće = cause of the accident

So:

• šteta = damage
• štete = of damage

That is why prijave štete means of the damage report/claim in the full phrase poslije prijave štete.

Because the noun has a different job there.

In provjerite djelomičnu štetu, the phrase djelomičnu štetu is the direct object of the verb provjerite (check). A direct object normally goes into the accusative case.

So:

• šteta = nominative
• štete = genitive
• štetu = accusative

That is why the same noun appears in two different forms in one sentence:

• prijave štete = of the damage
• provjerite ... štetu = check the damage

Because the adjective has to agree with the noun in case, gender, and number.

The noun šteta is feminine singular.
As the direct object here, it is in the accusative singular: štetu.

So the adjective djelomičan (partial) must also become accusative feminine singular:

• djelomična šteta = partial damage (subject form / dictionary-style phrase)
• djelomičnu štetu = partial damage (object form)

This kind of agreement is essential in Croatian.

Provjerite is the imperative form of provjeriti (to check, to verify).

It can be understood as:

• check
• verify
• please check (in formal instructions)
• check it (addressed to more than one person, or politely to one person)

In Croatian, the 2nd person plural imperative is also commonly used for:

1. speaking to several people, or
2. giving a polite/formal instruction to one person

That is why you often see forms like:

• provjerite
• unesite
• odaberite
• kliknite

in manuals, websites, and official instructions.

Grammatically, it is the plural imperative, but in real usage it can mean either:

• you all, check...
• please check... addressed politely/formally to one person

This is very common in Croatian instructions, customer service messages, and official writing.

So in a practical sentence like this, it often sounds like a neutral instruction rather than a very personal command.

Yes. Poslije and nakon both mean after and both take the genitive.

So you could also say:

• Nakon prijave štete provjerite djelomičnu štetu.

Both are grammatical.
In many contexts, nakon may sound a little more formal or neutral, while poslije can sound slightly more everyday, but both are standard Croatian.

Because Croatian has no articles.

English distinguishes between:

• a
• the

Croatian does not use separate words for these. The meaning is understood from context.

So:

• prijava štete can mean a damage report, the damage report, or just damage reporting, depending on context
• djelomičnu štetu can mean partial damage or the partial damage

A native English speaker often expects an article, but Croatian simply does not need one.

Not completely. Croatian word order is more flexible than English because cases show grammatical roles.

The given sentence is natural as an instruction:

• Poslije prijave štete provjerite djelomičnu štetu.

But some variations are possible, especially for emphasis or style, for example:

• Nakon prijave štete provjerite djelomičnu štetu.
• Djelomičnu štetu provjerite poslije prijave štete.

The original order is probably the most straightforward for an instruction: first the time sequence, then the action.

Here are the main forms:

• poslije = after
• prijava = report, application, claim
• šteta = damage
• provjeriti = to check, to verify
• djelomičan = partial

And here are the forms actually used in the sentence:

• prijave = genitive singular of prijava
• štete = genitive singular of šteta
• provjerite = imperative plural/formal singular of provjeriti
• djelomičnu = accusative feminine singular of djelomičan
• štetu = accusative singular of šteta

Yes. This kind of sentence is very typical of official or instructional Croatian.

Croatian often gives instructions by using:

• a time phrase first: Poslije prijave štete...
• then an imperative verb: provjerite...

This is common in:

• websites
• forms
• insurance instructions
• app interfaces
• manuals

So even if the exact phrase depends on the context, the grammar and style are very normal for an instruction.