Damos por entregado el juego de llaves.

Here dar por + participle/adjective means to consider something as already in that state, to treat it as, or to declare it to be.

So damos por entregado el juego de llaves does not literally mean we give the set of keys as delivered. It means something more like:

• we consider the set of keys delivered
• we declare the set of keys to have been handed over
• we acknowledge delivery of the set of keys

This is a very common formal pattern in Spanish:

• dar por terminado = to consider finished
• dar por perdido = to consider lost
• dar por hecho = to take for granted / consider established
• dar por recibido = to acknowledge receipt

Damos is the present tense, first person plural form of dar, so it means we give in a literal sense, but in this structure it works as we consider / we declare.

The subject is an understood nosotros:

• (Nosotros) damos por entregado...

In real-life Spanish, especially in formal or administrative language, the subject pronoun is usually omitted because the verb ending already shows who the subject is.

Depending on context, this we could refer to:

• a company
• an office
• the writers of a document
• the people signing a form

Because entregado is a past participle, not a finite verb.

The main verb of the sentence is damos. After dar por, Spanish often uses a participle or adjective to describe the state that something is considered to be in.

So the structure is:

• damos = we consider / we declare
• por entregado = as delivered
• el juego de llaves = the set of keys

If you said entregamos el juego de llaves, that would mean we handed over the set of keys. That is a different structure and a different emphasis.

Because entregado agrees with el juego de llaves, which is:

• masculine
• singular

Even though llaves is plural, the head noun is juego, and that is what controls agreement.

So:

• el juego de llaves → entregado
• la copia de las llaves → entregada
• los juegos de llaves → entregados
• las copias de las llaves → entregadas

This is a very common point for learners: the adjective or participle agrees with the main noun, not necessarily with the nearest noun.

Here juego does not mean game. In this context, juego de llaves means a set of keys or a bunch of keys that belong together.

Spanish juego can mean different things depending on context, such as:

• game
• set
• matching group

So here it is like:

• juego de llaves = set of keys
• juego de sábanas = set of bedsheets

This use is completely normal.

No, por is part of the fixed expression dar por + adjective/participle. You normally cannot omit it.

Compare:

• Damos por entregado el juego de llaves = We consider the set of keys delivered
• Damos entregado... = not natural Spanish

So por is essential to the meaning of the construction.

You can think of dar por as a chunk that learners should memorize together.

Yes, it sounds formal, administrative, and document-like.

You are much more likely to see it in:

• contracts
• receipts
• handover forms
• rental documents
• official reports

In everyday conversation, a speaker would more naturally say something like:

• Ya hemos entregado las llaves
• Las llaves ya están entregadas
• Consta que se han entregado las llaves in more formal language

So damos por entregado el juego de llaves has a clear bureaucratic or legal tone.

This is a good question. In formal language, Spanish often uses the present tense to perform an action at the moment of speaking or writing. This is sometimes called a performative present.

So the sentence is not just describing a past event. It is formally declaring something now:

• We hereby consider the set of keys delivered

That is why the present tense makes sense even though the delivery itself is complete.

English does something similar in legal or official language with forms like:

• We acknowledge receipt
• We declare
• We confirm

The difference is mainly in meaning and focus.

• Entregamos el juego de llaves = We handed over the set of keys
  • This focuses on the action of handing them over.
• Damos por entregado el juego de llaves = We consider / declare the set of keys delivered
  • This focuses on the official status or acknowledged result.

So the second one sounds less like a simple action and more like a formal statement in a process, record, or document.

Yes, effectively it is.

Historically it is the participle of entregar, but in this structure it behaves much like an adjective describing the state of the noun:

• el juego de llaves is considered entregado

This is why it agrees in gender and number, just like an adjective would.

That is also why this pattern looks similar to expressions such as:

• dar por terminado
• dar por cerrado
• dar por resuelto

In all of them, the final word describes the state that something is considered to be in.

Yes. Spanish has several formal ways to express a similar idea, but each has a slightly different tone.

For example:

• Se da por entregado el juego de llaves
  • very impersonal, formal
• Damos por entregado el juego de llaves
  • formal, with an explicit institutional we
• Se hace constar la entrega del juego de llaves
  • very official, almost legalistic
• Queda entregado el juego de llaves
  • formal, result-focused

So your sentence is perfectly natural in formal written Spanish, especially when the writer wants to sound official and explicit.