Agentul verifică documentul.

Because Romanian usually puts the definite article at the end of the noun instead of using a separate word before it.

So:

• agent = agent
• agentul = the agent
• document = document
• documentul = the document

This is one of the first big differences English speakers notice in Romanian.

The ending -ul is the definite article for many singular masculine and neuter nouns.

In this sentence:

• agentul = the agent
• documentul = the document

Even though both take -ul, they are not necessarily the same gender type:

• agent is masculine
• document is neuter

In Romanian, neuter nouns behave like masculine in the singular and like feminine in the plural. That is why documentul also uses -ul here.

Verifică is the 3rd person singular present tense form of the verb a verifica.

So it matches subjects like:

• el = he
• ea = she
• agentul = the agent

In grammatical terms, it is the present indicative.

Romanian often does not need subject pronouns when the subject is already clear.

Here, the subject is explicitly given as agentul, so there is no need to add el.

• Agentul verifică documentul. = normal, natural
• El verifică documentul. = He checks the document
• Agentul el verifică documentul. = not the normal way to say this

Romanian is a language where subject pronouns are often omitted unless you want emphasis, contrast, or clarification.

Yes. Romanian simple present often covers both meanings that English separates:

• checks (habitual or general present)
• is checking (action happening now)

So Agentul verifică documentul could mean either one, depending on context.

If the context makes it clear that the action is happening right now, Romanian often still just uses the present tense.

Mostly from word order and meaning.

The basic Romanian sentence pattern is usually:

• Subject + Verb + Object

So:

• Agentul = subject
• verifică = verb
• documentul = direct object

Also, semantically it makes sense that the agent is doing the checking and the document is being checked.

Grammatically, documentul is the direct object, so it is in the accusative case. But in this kind of noun, the accusative form looks the same as the nominative form, so the ending does not change here.

Because pe is often used before direct objects that are people, animate beings, or strongly specific/personal objects, especially with pronouns.

For an inanimate noun like documentul, Romanian normally does not use pe.

So:

• Agentul verifică documentul. = correct
• Agentul verifică pe documentul. = not correct

You are much more likely to see pe with something like a person:

• Agentul verifică pe turist.
  or more naturally in standard usage with definite/specific human objects in appropriate structures.

For this sentence, with documentul, no pe is needed.

It is neuter.

Romanian neuter nouns are a bit unusual for English speakers because they behave:

• like masculine in the singular
• like feminine in the plural

So in the singular:

• un document
• documentul

That is why it looks similar to a masculine noun here.

Yes, Romanian word order is more flexible than English, but Agentul verifică documentul is the most neutral and standard order.

This is the normal pattern:

• Subject + Verb + Object

You may see different orders for emphasis, contrast, or style, but they are not the plain default.

For a learner, Agentul verifică documentul is the safest and most natural way to say it.

The letter ă is a separate Romanian vowel. It is pronounced something like the uh sound or the a in English about, though Romanian pronounces it more clearly and consistently.

So verifică ends with this vowel sound, not with a silent letter.

Also, in verbs like this, the ending -ă is a common marker of the 3rd person singular present:

• el verifică
• ea verifică
• agentul verifică

So the ă is both a pronunciation clue and a grammar clue.