Obeležite predati prtljag i proverite potvrdu.

Obeležite is the imperative form of the verb obeležiti, meaning mark, label, or tag.

In this sentence, it is the 2nd person plural imperative, which Serbian also uses for:

• speaking to more than one person
• speaking to one person politely/formally

So obeležite means:

• mark/tag! when speaking to a group, or
• please mark/tag! when speaking politely to one person

The same is true for proverite later in the sentence.

The ending -te is the normal marker for the 2nd person plural imperative in Serbian.

So:

• obeleži = mark/tag! (to one person, informal)
• obeležite = mark/tag! (to several people, or one person formally)

And:

• proveri = check! (informal singular)
• proverite = check! (plural/formal)

English does not usually show this distinction, but Serbian does.

Because Serbian often leaves subject pronouns out when they are already clear from the verb form.

The ending of obeležite and proverite already tells you that the sentence is addressed to:

• you all, or
• you in a formal/polite way

So Serbian does not need to say vi explicitly here.

If vi were added, it would usually be for emphasis:

• Vi obeležite predati prtljag...

But in normal instructions, it is usually omitted.

Here predati prtljag means checked baggage or more literally baggage that has been handed over.

The word predati here is not functioning as a separate infinitive. It is being used adjectivally, describing prtljag.

So the structure is roughly:

• prtljag = baggage
• predati prtljag = baggage that has been handed in / checked baggage

This kind of participle-like adjective is common in Serbian.

Yes. It comes from the verb predati, which means to hand over, submit, or in some contexts check in.

In this sentence, predati describes the noun prtljag:

• predati prtljag = baggage that has been handed over

So a learner might think predati is another command, but here it is not. The commands are only:

• obeležite
• proverite

Because prtljag is the normal dictionary form here, and in this sentence it is in the accusative singular, which is the same as the nominative singular for this noun.

So:

• prtljag = baggage
• obeležite prtljag = mark the baggage

Since prtljag is an inanimate masculine noun, its accusative singular usually looks the same as its nominative singular.

Because potvrdu is the accusative singular form of potvrda.

The verb proveriti takes a direct object, so confirmation/receipt has to be in the accusative:

• potvrda = confirmation, receipt, certificate
• proverite potvrdu = check the confirmation/receipt

This is a very common pattern in Serbian:

• nominative: potvrda
• accusative: potvrdu

Potvrda can mean several related things depending on context:

• confirmation
• receipt
• certificate
• proof

In a baggage or airport context, it often means something like a baggage receipt, confirmation slip, or proof of check-in.

So the exact English word depends on the situation, but the Serbian word is broad enough to cover all of those.

Because these are perfective verbs, and that is very common in instructions when the speaker means do this as a completed action.

• obeležiti = to mark/tag completely
• proveriti = to check/verify completely

In commands like signs, announcements, and instructions, Serbian often prefers the perfective when the action should be completed once.

Very roughly:

• perfective imperative = do it / complete it
• imperfective imperative = be doing it / do it repeatedly / in general

So here the perfective sounds natural.

No, Serbian word order is fairly flexible, but this order is natural and clear for instructions.

The sentence:

• Obeležite predati prtljag i proverite potvrdu.

follows a straightforward instruction pattern:

1. verb
2. object
3. i
4. second verb
5. second object

You could sometimes move things around for emphasis, but in practical instructions this basic order is usually best.

I simply means and.

It links the two commands:

• Obeležite predati prtljag
• proverite potvrdu

So the sentence gives two related instructions in one line.

It sounds neutral to formal, mainly because of the -te imperative forms.

That makes it very appropriate for:

• public instructions
• airport or travel notices
• official written directions
• customer-facing messages

If you were speaking casually to one friend, you would more likely use singular informal imperatives:

• Obeleži predati prtljag i proveri potvrdu.

Yes. Obeležiti has a fairly broad meaning depending on context. It can mean:

• mark
• label
• tag
• indicate
• highlight

In the context of baggage, the best English choices are usually label or tag.

So learners should not assume it always has exactly one English equivalent.

Yes, absolutely. In Serbian, this is a perfectly complete sentence.

The verb forms already show the addressee, and imperative sentences very often omit the subject altogether. That is normal, not incomplete.

So:

• Obeležite predati prtljag i proverite potvrdu.

is fully grammatical and natural Serbian.