El boletín de denuncia indica la infracción de tráfico.

In this context, boletín de denuncia is an official police or administrative document reporting an offence. In Spain, it often refers to the written notice or report used for a traffic offence.

A very natural English translation here is something like:

• The citation form states the traffic offence
• The ticket/report indicates the traffic violation

It is not just any bulletin. Although boletín can mean bulletin in other contexts, here it means a formal written notice or form.

Not usually in normal English. That is a classic false friend.

In Spanish, denuncia often means:

• a report
• a complaint
• a formal accusation
• a citation/report issued by the authorities

So in this sentence, denuncia is part of an official/legal expression, not an emotional or dramatic denunciation in English.

Spanish often uses noun + de + noun where English might prefer an adjective or a different structure.

So:

• boletín de denuncia = literally report/citation form
• infracción de tráfico = traffic offence

This de structure is extremely common in Spanish. It often works like:

• centro de salud = health centre
• carnet de conducir = driving licence
• multa de tráfico = traffic fine

So de denuncia is just the normal way to specify what kind of boletín it is.

Indica comes from indicar, which often means:

• to indicate
• to state
• to specify
• to show

In this official context, indica is best understood as states or specifies.

So the sentence is saying that the form officially states which traffic offence was committed.

Because it refers to a specific offence: the one listed on that particular notice.

Compare:

• una infracción = a traffic offence, any one in general
• la infracción = the specific offence being referred to

In official or administrative language, Spanish often uses the definite article when the reference is clear from the context.

De tráfico means related to road traffic or traffic-related.

It describes infracción, not boletín.

So the structure is:

• El boletín de denuncia = the citation/report form
• indica = states
• la infracción de tráfico = the traffic offence

In other words, the sentence means that the report states what the traffic violation is.

Because de tráfico is being used in a general, classifying sense: a traffic offence.

Use de + noun without the article when the second noun classifies the first:

• accidente de tráfico = traffic accident
• multa de aparcamiento = parking fine
• infracción de tráfico = traffic offence

If you said del tráfico, it would sound more like of the traffic, which is not the intended meaning here.

Not exactly.

• infracción de tráfico = the offence or violation itself
• multa = the fine or monetary penalty

So someone commits una infracción, and as a result may receive una multa.

That is an important distinction. The sentence says the form indicates the offence, not necessarily the amount of the fine.

Because la infracción de tráfico is the direct object of indica.

The verb indicar normally takes a direct object without a preposition:

• El mapa indica la ruta
• La señal indica la dirección
• El boletín indica la infracción

So this is normal Spanish sentence structure.

Yes, but the original order is the most neutral and natural.

The standard pattern is:

• subject + verb + object

So:

• El boletín de denuncia = subject
• indica = verb
• la infracción de tráfico = direct object

You could rearrange it for emphasis in some contexts, but the given version is the clearest and most standard.

Yes. It sounds formal and administrative, which fits the context perfectly.

Words like:

• boletín
• denuncia
• infracción
• tráfico

are very common in official Spanish from Spain, especially in police, legal, or traffic-related documents.

In everyday speech, people might say something simpler depending on the situation, but for a form or notice, this wording is very natural.