Revisa la documentación antes de salir de casa.

Yes. Revisa is the tú imperative of revisar, so it means check / review as a command addressed to one person in an informal way.

So the sentence is telling someone:

• Revisa... = Check... / Review...

If you were speaking more formally to one person, you would say:

• Revise la documentación...

If you were speaking to several people in Spain, you might say:

• Revisad la documentación... for vosotros
• Revisen la documentación... for ustedes

Because revisa here is an imperative form, not a normal present-tense statement.

Compare:

• Revisas la documentación. = You check the documentation.
  This is a statement.
• Revisa la documentación. = Check the documentation.
  This is a command.

For regular -ar verbs, the tú command often looks like the él/ella/usted present form:

• revisar → revisa
• hablar → habla
• mirar → mira

La documentación usually means the documentation, the papers, or the required documents/paperwork.

In real usage, it often refers to things like:

• ID
• passport
• tickets
• travel papers
• official documents
• car papers, depending on context

Spanish often uses documentación as a collective noun for a set of documents, even where English might prefer documents or paperwork.

Spanish uses definite articles more often than English does.

Here, la documentación suggests the documentation that is relevant in this situation. It does not necessarily mean a very specific single document; it can mean the set of papers you are expected to have.

English often drops the article in similar cases:

• Spanish: Revisa la documentación
• Natural English: Check the documents / Check your paperwork

So the article is completely normal in Spanish.

Because after antes, Spanish normally uses de before an infinitive.

So:

• antes de + infinitive

Examples:

• antes de salir = before leaving
• antes de comer = before eating
• antes de entrar = before going in

So antes de salir is the standard structure.

Salir is the infinitive.

It appears in the structure:

• antes de + infinitive

So antes de salir literally means before leaving.

Spanish often uses the infinitive where English uses the -ing form:

• antes de salir = before leaving
• después de comer = after eating
• sin decir nada = without saying anything

Because casa often appears without an article when it means home in a general, familiar sense.

So:

• salir de casa = leave home
• estar en casa = be at home
• volver a casa = go back home

If you say la casa, it sounds more like the house/building as a physical object, or a specific house being referred to more explicitly.

Compare:

• Salgo de casa a las ocho. = I leave home at eight.
• Salgo de la casa azul. = I’m leaving the blue house.

In this sentence, it is much more natural to understand casa as home.

So antes de salir de casa is best understood as:

• before leaving home

Even though casa can literally mean house, many everyday expressions use it in the sense of home.

Yes, you could, but it changes the tone slightly.

• antes de salir de casa = the most natural, general expression for before leaving home
• antes de salir de mi casa = more explicit, with extra emphasis on my house/home

In many situations, de casa sounds more idiomatic and natural unless you really need to stress whose home it is.

They are similar, but not identical.

• revisar = to review, inspect, check carefully
• mirar = to look at
• comprobar = to check, verify, make sure

In this sentence, revisa la documentación suggests go over the documents carefully.

Depending on context, you could also hear:

• Comprueba la documentación = Check/verify the documents
• Mira la documentación = Look at the documents

But revisa feels especially suitable if the idea is to inspect them before leaving.

The sentence itself is standard Spanish, but the form revisa shows that it is addressing one person informally.

That is normal in Spain and elsewhere. What makes a Spain-specific difference more visible is the plural informal form:

• Spain: Revisad la documentación antes de salir de casa.
• Much of Latin America: Revisen la documentación antes de salir de casa.

So the given sentence is not uniquely Spanish-from-Spain, but it fits perfectly well in Spain.

Yes. That is very common.

Documentación is often a singular collective noun referring to a group of documents as one set of paperwork.

So even if there are multiple papers, Spanish can still say:

• la documentación

This is similar to English words like paperwork, which are singular in form but may refer to many individual papers.

It is understandable, but in natural English, a more idiomatic translation would often be:

• Check the documents before leaving home
• Review the paperwork before leaving home

Why?

• de casa usually means from home, not necessarily from the house
• documentación often sounds more natural in English as documents, papers, or paperwork, depending on context

So a fully literal translation is possible, but it may sound less natural than the intended everyday meaning.