Para fazer o cadastro, eles pedem uma cópia do documento original.

It literally means To do the registration or In order to complete the registration.

• para = for / in order to
• fazer = to do / to make
• o cadastro = the registration / the sign-up / the record creation

In Portuguese, para + infinitive is a very common way to express purpose:

• Para estudar, preciso de silêncio. = To study, I need silence.
• Para entrar, mostre o documento. = To enter, show your document.

So here, Para fazer o cadastro means in order to register / to complete the registration process.

Cadastro is a very common Brazilian Portuguese word, and it often refers to:

• a registration
• an application record
• a sign-up
• an official entry in a system

Depending on context, it could mean:

• creating an account
• enrolling in a service
• entering someone’s information into a database
• registering for something officially

It is used a lot in bureaucracy, websites, stores, banks, clinics, and government settings.

Examples:

• fazer um cadastro = to register / to create a registration
• preencher o cadastro = to fill out the registration form
• atualizar o cadastro = to update your registered information

Brazilian Portuguese often uses fazer + noun where English might prefer a single verb.

So instead of saying exactly to register, Portuguese often says:

• fazer o cadastro = literally do the registration

There is also a related verb, cadastrar:

• Para se cadastrar... = To register...
• Para cadastrar alguém... = To register someone...

But fazer o cadastro is extremely natural and common, especially in everyday Brazilian Portuguese.

Yes. A very natural alternative would be:

• Para se cadastrar, eles pedem uma cópia do documento original.

That means essentially the same thing: To register, they ask for a copy of the original document.

The difference is mostly stylistic:

• fazer o cadastro sounds very common and slightly more noun-based
• se cadastrar sounds more directly verbal: to register oneself

Both are correct and natural in Brazilian Portuguese.

Using o cadastro here is natural because it refers to the registration process in question, the specific one you are trying to complete.

Compare:

• Para fazer o cadastro... = To complete the registration...
• Para fazer um cadastro... = To make a registration / to create a registration

Both can exist, but o cadastro often sounds more like the known process in that situation.

This is common in Portuguese: the definite article is often used where English might be more flexible.

Eles literally means they, but in this sentence it often refers to the people/institution in charge.

For example, it could mean:

• the office staff
• the company
• the school administration
• the people processing the registration

In English, we also do this:

• They asked for my ID.
• They need proof of address.

So eles pedem does not necessarily mean a specific group of men; it just means the people responsible ask for / require it.

Pedem is the present tense of pedir (to ask for / to request), third person plural:

• eu peço
• você/ele/ela pede
• eles/elas pedem

In this sentence, the present tense expresses a general rule or usual requirement:

• eles pedem uma cópia... = they ask for / they require a copy...

It does not necessarily mean they are asking right now at this exact moment. It can mean this is what they normally require.

It can feel like either one, depending on context.

Literally, pedir means to ask for. But in administrative or official contexts, English often translates it more naturally as:

• ask for
• request
• require

So:

• eles pedem uma cópia do documento original

can be understood as:

• they ask for a copy of the original document
• they require a copy of the original document

All are possible depending on tone.

This means a copy of the original document.

Breakdown:

• uma cópia = a copy
• do = of the
• documento original = original document

So the structure is:

• cópia de + noun
• cópia do documento = copy of the document

Then original describes documento:

• documento original = original document

So the whole phrase is:

• a copy of the original document

Do is a contraction of:

• de + o = do

This is mandatory in normal Portuguese.

So:

• cópia de o documento ❌
• cópia do documento ✅

Other common contractions:

• de + a = da
• em + o = no
• em + a = na
• a + o = ao
• a + a = à

Here, do documento means of the document.

In Portuguese, adjectives often come after the noun.

So:

• documento original = original document
• cópia autenticada = certified copy
• cadastro completo = complete registration

This is one of the most common word-order differences from English.

Sometimes adjective position can change meaning or emphasis, but in this case documento original is the normal order.

Yes, usually documento original means the actual original document, not a copy.

So if they ask for:

• uma cópia do documento original

they mean:

• a copy made from the real original document

In real-world use, this often implies they want a photocopy or scan of the original, not a copy of another copy.

Possibly, yes.

Documento is a broad word meaning document, but in Brazil it can often refer to personal identification documents, depending on context.

For example:

• documento de identidade = identity document / ID
• documentos can mean official papers in general

So in this sentence, documento original could refer to:

• an ID card
• a passport
• a birth certificate
• some other official original document

The exact meaning depends on the situation.

It is very natural and neutral. It works well in:

• everyday speech
• customer service
• office communication
• written instructions
• administrative situations

It is not overly formal, but it is also not slangy. It sounds like normal standard Brazilian Portuguese.

Sometimes, yes, but para + infinitive is the most straightforward and common choice here.

For example:

• Para fazer o cadastro... = To complete the registration...
• A fim de fazer o cadastro... = In order to complete the registration...
  This sounds more formal.

In normal Brazilian Portuguese, para fazer is the most natural option.

Not perfectly. A very literal translation would be:

• For doing the registration, they ask a copy of the original document.

But that is not natural English. A better natural translation is:

• To register, they ask for a copy of the original document.
• To complete the registration, they require a copy of the original document.

This is a good example of why direct word-for-word translation is often less useful than understanding the structure and then expressing it naturally in English.