Entregamos no cacifo, contanto que esteja disponível.

In Portugal, cacifo usually means locker.

In this sentence, it most likely refers to a parcel locker or pickup locker where a delivery can be left for collection.

A useful note for learners:

• In European Portuguese, cacifo is a normal everyday word.
• In Brazilian Portuguese, this word is much less common in this meaning.

Because no is the normal contraction of em + o.

So:

• em + o = no
• em + a = na
• em + os = nos
• em + as = nas

So no cacifo literally comes from em o cacifo.

This kind of contraction is required in standard Portuguese. Native speakers would not normally say em o cacifo.

Here it means we deliver.

In European Portuguese, this is the present tense of entregar:

• nós entregamos = we deliver / we are delivering

A very useful detail:

• In European Portuguese, the past simple form is usually written entregámos
• So entregamos = present
• entregámos = past

That spelling difference helps a lot.

Because Portuguese often leaves out subject pronouns when the verb already makes the subject clear.

So:

• Entregamos already tells you the subject is we
• Adding nós is possible, but not necessary

This is very common in Portuguese. English usually needs the subject, but Portuguese often does not.

Contanto que means provided that, as long as, or on condition that.

It introduces a condition.

So the structure is basically:

• We deliver to the locker, provided that ...
• We deliver to the locker, as long as ...

It is a perfectly correct expression, though it can sound a little more formal or written than some other alternatives.

Because contanto que requires the subjunctive.

So after contanto que, Portuguese uses the present subjunctive:

• esteja = present subjunctive of estar
• not está, which is the indicative form

This is one of the most important patterns to learn:

• contanto que + subjunctive
• desde que + subjunctive
• para que + subjunctive
• embora + subjunctive

So contanto que esteja disponível is grammatically expected.

Esteja is the present subjunctive form of estar for:

• eu
• ele / ela / você
• and also the formal singular subject in many contexts

In this sentence, the subject is understood as something singular, such as:

• o cacifo
• o serviço
• o método de entrega

That is why the adjective is also singular: disponível.

Most likely, it refers to the locker being available.

So the idea is probably:

• delivery to the locker is possible
• but only if that locker is available

Depending on the wider context, it could also refer to the locker option or delivery slot, but the most natural reading is that the cacifo is available.

It is correct and understandable, but many speakers would more naturally use:

• desde que esteja disponível
• se estiver disponível

These can sound a bit more everyday.

For example:

• Entregamos no cacifo, desde que esteja disponível.
• Entregamos no cacifo, se estiver disponível.

So contanto que is not wrong at all, but it may sound slightly more formal or more written.

In this context, no cacifo is the most natural choice.

Why? Because Portuguese often uses em / no / na with the idea of placing or leaving something in a location.

So:

• entregar no cacifo = deliver into / to the locker

Other options may be possible in some contexts, but they are less natural here:

• ao cacifo sounds odd
• para o cacifo is not the usual phrasing for this kind of delivery message

For parcel-delivery language in Portugal, no cacifo sounds normal.

Because contanto que esteja disponível is a conditional clause added after the main clause.

The comma helps separate:

• the main statement: Entregamos no cacifo
• the condition: contanto que esteja disponível

In short:

• it is natural and standard to write the comma here
• it makes the sentence easier to read

Yes, it strongly sounds like European Portuguese.

The clearest clue is cacifo, which is very typical in Portugal.

Also, the sentence style fits the kind of concise service or delivery message you often see in European Portuguese.

A Brazilian Portuguese version would probably be phrased differently, especially because cacifo is not the usual everyday word there.