O perito pediu a participação e o comprovativo.

Perito usually means expert or specialist. In real-life European Portuguese, it is often used for someone such as:

• an insurance assessor
• a forensic expert
• a technical expert

So the exact English word depends on context. It is not just any skilled person; it often sounds fairly official or professional.

Pediu is the pretérito perfeito simples of pedir.

That means it refers to a completed action in the past:

• pedir = to ask for / to request
• pediu = asked for / requested

So O perito pediu... means The expert asked for... or The expert requested...

Because pedir normally takes a direct object in Portuguese.

So you say:

• pedir algo = to ask for something
• pedir a alguém = to ask someone

Examples:

• Pediu o documento. = He asked for the document.
• Pediu ao cliente o documento. = He asked the client for the document.

English often uses ask for, but Portuguese usually does not need a separate word like for here.

They are the definite articles:

• a participação = the participation / the report / the notice
• o comprovativo = the proof / the supporting document

In this sentence, the speaker is talking about specific items, not just any participation/report or any proof document.

Portuguese uses definite articles more often than English does, so this is very normal.

Not necessarily. This is a very important vocabulary point.

Although participação can mean participation, in formal or administrative Portuguese it often means something like:

• report
• notification
• formal statement
• claim notice

In contexts such as insurance, police, or official paperwork, participação can refer to a document reporting an event or incident.

So this is a case where the literal English-looking word can be misleading.

Comprovativo means a document that proves something. Depending on context, it can be:

• proof
• supporting document
• receipt
• evidence of payment / residence / identity / etc.

In Portugal, comprovativo is very common in official and administrative language.

For example:

• comprovativo de morada = proof of address
• comprovativo de pagamento = proof of payment

It is especially common in European Portuguese. In Brazilian Portuguese, people very often say comprovante instead.

So:

• Portugal: comprovativo
• Brazil: often comprovante

Both relate to proof/supporting documentation, but comprovativo sounds very natural in Portugal.

Because nouns in Portuguese have grammatical gender.

Here:

• participação is feminine, so it takes a
• comprovativo is masculine, so it takes o

That is why the sentence has:

• a participação
• o comprovativo

This gender is grammatical, so it is something you need to learn with each noun.

Yes. Portuguese often drops the subject when it is clear from context.

So both are possible:

• O perito pediu a participação e o comprovativo.
• Pediu a participação e o comprovativo.

The full version with O perito is clearer and more explicit. The version without the subject would be natural if everyone already knows who is being talked about.

When two nouns are joined by e and they have different genders, each noun normally keeps its own article:

• a participação
• o comprovativo

So:

• a participação e o comprovativo

If both nouns had the same gender, Portuguese might still repeat the article, depending on style and clarity. Here, repeating the article is completely normal and necessary because the nouns have different genders.

Yes, depending on context.

Pedir can mean:

• to ask for
• to request
• to order (for example in a restaurant)

Examples:

• Pediu ajuda. = He asked for help.
• Pediu um café. = He ordered a coffee.

In your sentence, requested or asked for is the best fit.

Very natural. The whole sentence already sounds quite formal because of words like:

• perito
• participação
• comprovativo

This is the kind of wording you might see in:

• insurance cases
• legal matters
• public administration
• formal correspondence

So it sounds more official than everyday casual conversation.

In European Portuguese, it is roughly:

par-ti-ci-pa-ÇÃO

A few useful points:

• the final -ção sounds like sown with a nasal ending, not like English shun
• unstressed vowels are often reduced in European Portuguese
• the stress is on the last syllable: -ÇÃO

Likewise:

• perito → stress on ri
• pediu → stress on the second syllable
• comprovativo → stress on ti

If you want to sound more European Portuguese, remember that many unstressed vowels become weaker than in Brazilian Portuguese.