Касирка питає, чи Вам потрібен чек.

A word-by-word breakdown:

• Касирка = female cashier
• питає = asks / is asking
• чи = whether / if for a yes-no clause
• Вам = to you / for you in the dative case, here used as the polite/formal you
• потрібен = needed / necessary
• чек = receipt

A very literal translation is:

• The cashier asks whether a receipt is needed for you.

A natural English translation is:

• The cashier asks whether you need a receipt.

Касирка is the feminine form, so it tells you the cashier is a woman.

• касир = male cashier
• касирка = female cashier

In English, cashier is usually gender-neutral, but Ukrainian often marks gender in job titles and nouns referring to people.

Чи introduces an indirect yes-no question. Here it means whether or if.

So:

• Касирка питає = The cashier asks
• чи Вам потрібен чек = whether you need a receipt

You can think of чи as the word that turns the second part into whether you need a receipt rather than a statement.

It is very common after verbs like:

• питати = to ask
• знати = to know
• не знаю = I don’t know

For example:

• Не знаю, чи він прийде. = I don’t know whether he will come.

Because чи Вам потрібен чек is a subordinate clause.

Ukrainian normally uses a comma before clauses introduced by words like:

• що = that
• коли = when
• якщо = if
• чи = whether

So:

• Касирка питає, чи Вам потрібен чек.

That comma is standard Ukrainian punctuation.

Because the structure with потрібен uses the person in the dative case.

So Ukrainian says something closer to:

• A receipt is needed for you
• not literally you need a receipt with you as the grammatical subject

That is why you get:

• мені потрібен чек = I need a receipt
• тобі потрібен чек = you need a receipt, informal singular
• Вам потрібен чек = you need a receipt, polite/formal or plural
• нам потрібен чек = we need a receipt

Compare the forms:

• ви = you, nominative
• вас = you, accusative/genitive
• Вам = to you, dative

Here, only Вам fits.

Capitalizing Вам is a politeness convention when addressing someone respectfully.

So:

• Вам with a capital letter = polite, respectful you
• вам with a lowercase letter = also possible in many texts, especially neutral or less formal writing

Both can be seen in real life, but the capital letter adds a formal customer-service tone.

Потрібен agrees with чек, and чек is a masculine singular noun.

So the form changes depending on the gender and number of the thing needed:

• потрібен чек = a receipt is needed, masculine singular
• потрібна ручка = a pen is needed, feminine singular
• потрібне місце = a place is needed, neuter singular
• потрібні документи = documents are needed, plural

So in this sentence, потрібен is masculine because чек is masculine.

In the present tense, Ukrainian often omits the verb to be.

So where English says:

• you need a receipt
• or more literally a receipt is necessary for you

Ukrainian can simply say:

• Вам потрібен чек

There is no separate present-tense is here. This is completely normal.

Yes. Ukrainian word order is fairly flexible, though the emphasis changes.

This sentence:

• Касирка питає, чи Вам потрібен чек.

is natural and clear.

You might also hear or see:

• Касирка питає, чи потрібен Вам чек.

This version is also correct. It may sound a little more neutral or slightly more formal in flow.

As a direct question to the customer, people often say:

• Вам потрібен чек?
• Чи потрібен Вам чек?

All of these are understandable. The differences are mostly about emphasis and style, not basic meaning.

Yes. In a shopping or cashier context, чек usually means a receipt, especially a printed store receipt.

So in this sentence:

• чек = receipt

This is a very common word in shops, supermarkets, pharmacies, and other places where you pay for something.

Common short answers are:

• Так, будь ласка. = Yes, please.
• Так. = Yes.
• Ні, дякую. = No, thank you.
• Не треба, дякую. = No need, thank you.

If you want to sound polite in a store, будь ласка and дякую are very useful.