O remetente expediu o correio registado.

Remetente means sender or the person who sends something.

In postal language, it is the opposite of:

• destinatário = recipient / addressee

So in this sentence, o remetente is the person who sent the registered mail.

Expediu is the 3rd person singular form of the verb expedir in the pretérito perfeito simples (the simple past / preterite).

Here it means:

• he/she/it dispatched
• he/she/it sent
• he/she/it mailed

So:

• eu expedi
• tu expediste
• ele/ela/você expediu

In this sentence, expediu matches o remetente:

• O remetente expediu... = The sender sent/dispatched...

Both can work, but expedir is a bit more formal and often appears in postal, administrative, or logistics contexts.

• enviar = to send
• expedir = to dispatch / send out / issue

So expediu o correio registado sounds slightly more official or bureaucratic than enviou o correio registado.

In everyday speech, many speakers might more naturally say something like:

• O remetente enviou a carta registada.

But the original sentence is still correct.

Correio registado means registered mail.

It refers to postal mail that is officially recorded/tracked by the postal service.

Breakdown:

• correio = mail / post
• registado = registered

So together:

• correio registado = registered mail

In practical terms, it usually means there is some formal proof of posting and/or delivery.

In European Portuguese, the normal form is registado.

In Brazilian Portuguese, you will often see registrado.

So this sentence is clearly in Portuguese from Portugal style:

• Portugal: registo, registado
• Brazil: registro, registrado

Both come from the same root, but the preferred standard form differs by variety.

In Portuguese, adjectives often come after the noun, much more often than in English.

So:

• correio registado = literally mail registered
• natural English: registered mail

This is completely normal in Portuguese:

• carta importante = important letter
• encomenda urgente = urgent parcel
• correio registado = registered mail

Sometimes adjectives can go before the noun, but after the noun is the default in many cases.

Portuguese uses definite articles very often, more often than English.

So:

• O remetente = the sender
• o correio registado = the registered mail

Even where English might sometimes omit an article, Portuguese often keeps it.

Here both are specific:

• a specific sender
• a specific registered item / piece of registered mail

So the articles are natural and expected.

Yes, correio can refer to different but related ideas depending on context.

It can mean:

• mail / post
• postal service
• sometimes post office in certain expressions

Examples:

• receber correio = to receive mail
• enviar pelo correio = to send by mail
• ir aos Correios = to go to the post office (more common in Brazil)

In your sentence, correio clearly means mail, not the building.

It is correct, but depending on context, many speakers might more naturally say:

• carta registada = registered letter
• encomenda registada = registered parcel
• correspondência registada = registered correspondence

That is because correio can sound a bit broad. If you know exactly what was sent, Portuguese often prefers naming the item more specifically.

So:

• O remetente expediu o correio registado. = correct
• O remetente expediu a carta registada. = often more concrete and natural if it was a letter

A rough European Portuguese pronunciation guide is:

• O → oo / u
• remetente → ruh-meh-TEN-tuh
• expediu → esh-puh-DYOO (roughly)
• o → u
• correio → kuh-RAY-u
• registado → ruh-zhish-TA-doo (roughly)

A few important European Portuguese points:

• Unstressed e often sounds weak, like uh or even disappears.
• s before a consonant often sounds like sh.
• The g in registado sounds like the s in measure.

A rough full approximation:

u ruh-meh-TEN-tuh esh-puh-DYOO u kuh-RAY-u ruh-zhish-TA-doo

This is only an approximation for English speakers, but it helps.

The structure is:

• O remetente = subject
• expediu = verb
• o correio registado = direct object

So it follows a very familiar pattern:

Subject + Verb + Object

That means English speakers usually find the structure easy to understand:

• The sender
  • dispatched
    • the registered mail

The main challenge is usually vocabulary, not word order.

It is mostly regular in many forms, but learners often notice its past forms because they are not based on the most common -ir pattern they may first expect.

Useful forms:

• expedir = infinitive
• expede = he/she dispatches
• expediu = he/she dispatched
• expedido = dispatched / sent out / issued

For practical learning, it is a good idea to memorize:

• expedir
• expediu
• expedido

because these forms appear often in formal or postal contexts.

Potentially yes, because expedir can also mean to issue in administrative contexts.

For example:

• expedir um documento = to issue a document
• expedir uma certidão = to issue a certificate

But in your sentence, because the object is o correio registado, the meaning is clearly sent/dispatched mailed post, not issued.

So context decides the best translation.

You make it negative by putting não before the verb:

• O remetente não expediu o correio registado.
• The sender did not dispatch the registered mail.

This is the normal Portuguese pattern for negation:

• não + verb

Examples:

• Ele enviou a carta. = He sent the letter.
• Ele não enviou a carta. = He did not send the letter.

In Portuguese, you can often make a yes/no question just by using intonation, without changing the word order.

So:

• O remetente expediu o correio registado?

This means:

• Did the sender dispatch the registered mail?

Portuguese does not usually need a helper verb like did.

You can also make it more explicit:

• Foi o remetente que expediu o correio registado?
  = Was it the sender who dispatched the registered mail?

But the simple intonation question is the most direct version.