Proszę zachować ten paragon.

This sentence uses the very common Polish pattern proszę + infinitive.

So here:

• proszę = a polite request marker, roughly please
• zachować = the infinitive to keep / to retain
• ten paragon = this receipt

This pattern is often used for polite instructions, especially in shops, offices, public notices, and formal speech. It sounds more polite and less direct than a plain imperative.

Because proszę + infinitive is a standard polite way to tell someone to do something.

Compare:

• Proszę zachować ten paragon. = polite, neutral, common in service situations
• Zachowaj ten paragon. = direct singular command
• Zachowajcie ten paragon. = direct plural command

A cashier, notice, or formal instruction will very often use proszę + infinitive rather than the imperative. It sounds less personal and more courteous.

Here, proszę works like please.

Literally, it comes from the verb prosić meaning to ask / to request, and proszę is historically the I ask form. But in everyday Polish, it very often functions idiomatically as a polite marker.

So in this sentence, you should understand proszę as part of the polite instruction, not as a full literal I ask.

Also, proszę can mean other things in other contexts, for example:

• Proszę. = Here you are.
• Proszę? = Pardon? / Come again?

So the exact meaning depends a lot on context.

This is about aspect, which is very important in Polish.

• zachować = perfective
• zachowywać = imperfective

In this sentence, zachować is used because the speaker means a single complete action with a clear result: keep the receipt; do not throw it away.

That is why the perfective form sounds natural here.

Using zachowywać would suggest an ongoing or repeated action, which does not fit as well in this context.

So:

• Proszę zachować ten paragon. = Please keep this receipt.
• Proszę zachowywać... would usually sound odd here unless you meant a habitual or repeated action.

Ten paragon is in the accusative, because it is the direct object of zachować.

The dictionary form of paragon is nominative singular:

• ten paragon

For a masculine inanimate noun like paragon, the accusative singular is the same as the nominative singular. That is why it does not visibly change here.

So:

• nominative: ten paragon
• accusative: ten paragon

This is normal for masculine inanimate nouns in Polish.

Because ten has to agree with paragon in gender, number, and case.

Paragon is:

• masculine
• singular
• inanimate
• accusative here

For a masculine singular inanimate noun in the accusative, the demonstrative is ten.

So:

• ten paragon = this receipt

This happens to look the same as the nominative form, but it is still grammatically accusative in the sentence.

No. This is a classic false friend.

In Polish, paragon means receipt, especially a shop receipt.

It does not mean the English word paragon as in a model of excellence.

A learner should remember:

• Polish paragon = receipt
• English paragon = an ideal example of something

Also, in some contexts Polish uses rachunek for bill / check, especially in restaurants, while paragon is specifically the receipt you get after a purchase.

Yes, you could.

• Proszę zachować ten paragon. = Please keep this receipt.
• Proszę zachować paragon. = Please keep the receipt / keep your receipt.

Using ten makes it slightly more specific and concrete: this receipt, the one being handed to you right now.

Without ten, the sentence sounds a bit more general, like a standard instruction. Both are natural.

Yes, in a sense.

Polish often leaves out subject pronouns when they are understood from context. In instructions and requests, this is very normal.

English needs you in many similar sentences, but Polish often does not.

Here, the sentence is directed at the listener or reader, but it does not need to say ty, pan, pani, or wy.

That is one reason the sentence sounds neutral and practical. It works well:

• when spoken to one customer
• in a public notice
• in a general service context

Yes, Polish word order is flexible, but the neutral version here is:

Proszę zachować ten paragon.

You might also hear or see:

• Ten paragon proszę zachować.

That version puts more emphasis on ten paragon, as if distinguishing it from something else.

So the original sentence is the most neutral and standard order, especially for ordinary instructions.

It is grammatically a polite request, but in real life it often functions as an instruction.

In places like shops, it is basically the polite equivalent of:

• Keep this receipt
• Please retain this receipt

So it sits somewhere between a request and an instruction. That is very common in Polish service language: the form is polite, but the practical function is directive.