A razão social e o nome fantasia estão certos.

Because the subject is plural:

• a razão social
• e
• o nome fantasia

These are two things joined by e (and), so Portuguese uses a plural verb.

• singular: A razão social está certa.
• singular: O nome fantasia está certo.
• plural: A razão social e o nome fantasia estão certos.

So estão is the 3rd person plural form of estar.

This is because of agreement.

In Portuguese, adjectives usually agree with the noun(s) in:

• number: singular or plural
• gender: masculine or feminine

Here, the sentence talks about two nouns, so the adjective must be plural.

Now for gender:

• razão social is feminine
• nome fantasia is masculine

When a masculine noun and a feminine noun are grouped together, Portuguese normally uses the masculine plural form for agreement.

So:

• not certo → singular
• not certa → singular feminine
• not certas → plural feminine
• but certos → plural masculine, which matches the mixed group

In this sentence, estar certo means something like to be correct / to be right / to be in order.

Portuguese often uses estar for a current state or condition. Here, the idea is that the company information is currently correct.

So:

• estão certos = are correct / are right

If you used ser, it would sound less natural in this context. In business or form-filling language, estar certo is very common for saying that information is correct.

These are common Brazilian business terms.

• razão social = the company’s legal registered name
• nome fantasia = the trade name, brand name, or the name the business publicly uses

So they are not just random nouns; they are fixed expressions used in business and legal contexts in Brazil.

Portuguese uses definite articles much more often than English.

So it is normal to say:

• a razão social
• o nome fantasia

Even where English might simply say legal name and trade name, Portuguese often prefers the articles.

Also, because the two nouns have different genders, each one keeps its own article:

• a for the feminine noun phrase razão social
• o for the masculine noun phrase nome fantasia

The gender comes from the main noun in each expression.

• razão is feminine → a razão social
• nome is masculine → o nome fantasia

In nome fantasia, the word fantasia does not make the whole phrase feminine. The core noun is still nome, so the whole phrase is masculine.

This is similar to how the main word determines the grammar of the phrase.

Yes, absolutely. Corretos is a very natural alternative.

Both are possible:

• estão certos
• estão corretos

A small nuance:

• correto often sounds a bit more formal or precise
• certo is very common in everyday speech and can mean correct, right, or okay

In administrative or business contexts, both can work well.

In this sentence, certos comes after the verb and refers back to both nouns, so the normal structure is:

• A razão social e o nome fantasia estão certos.

Also, be careful: when certo/certos comes before a noun, it can change meaning.

For example:

• certos nomes = certain names / some names

But:

• nomes certos = correct names

So in your sentence, certos after the verb clearly means correct.

You can say that:

• A razão social está certa e o nome fantasia está certo.

That is grammatically correct.

But when both things share the same idea, Portuguese often combines them into one sentence with one plural verb and one plural adjective:

• A razão social e o nome fantasia estão certos.

This is more compact and natural when both items are being described in the same way.

Yes, more or less, but the range of meaning is broad.

Certo can mean:

• correct
• right
• okay
• certain (in other contexts)

In this sentence, certos means correct or right.

That is why context matters a lot with certo.

A rough approximation is:

• estão ≈ es-TOWng (with a nasal ending)

A few pronunciation notes:

• The stress is on the last syllable: -tão
• The ão sound is nasal, which is very common in Portuguese
• It is not pronounced like English ow exactly; it has a nasal quality

The same nasal sound appears in razão.

So both razão and estão may feel tricky at first because of ão.

In some contexts, yes, especially in:

• forms
• labels
• headings
• checklist-style language

For example, on a form or interface, you might see something shorter like:

• Razão social e nome fantasia estão certos

But in a normal full sentence, using the articles is more standard and natural:

• A razão social e o nome fantasia estão certos.

So the version with articles is the safest default for learners.

Yes. That is also correct:

• O nome fantasia e a razão social estão certos.

The meaning stays the same. The order may change depending on what the speaker wants to mention first.

The grammar still works the same way:

• two coordinated nouns
• plural verb: estão
• masculine plural adjective: certos

Because the group still includes a masculine noun and a feminine noun.