Oświadczenie jest gotowe, a formularz odstąpienia jest w przesyłce zwrotnej.

Because oświadczenie is a neuter singular noun, and the adjective has to agree with it in gender and number.

• oświadczenie = neuter
• gotowe = neuter singular form of gotowy (ready)

Compare:

• dokument jest gotowy = the document is ready
• umowa jest gotowa = the contract is ready
• oświadczenie jest gotowe = the statement/declaration is ready

So gotowe matches oświadczenie.

In this sentence, a means something like and, but with a slight sense of meanwhile, while, or and as for the other thing.

• i simply joins two items: X and Y
• a often links two related statements, sometimes with a mild contrast or just a shift of focus

So:

• Oświadczenie jest gotowe, a formularz odstąpienia jest w przesyłce zwrotnej.

sounds like:

• The statement is ready, and the withdrawal form is in the return package.

Using a is very natural here because the speaker is giving two separate pieces of information about two different things.

Because Polish often uses the genitive case after one noun to show a relationship like of in English.

So:

• formularz = form
• odstąpienie = withdrawal / cancellation / rescission
• formularz odstąpienia = form of withdrawal / withdrawal form

Here odstąpienie changes to odstąpienia, which is the genitive singular form.

This is a very common Polish pattern:

• numer telefonu = phone number
• koniec dnia = end of the day
• formularz odstąpienia = withdrawal form

In everyday Polish, odstąpienie often appears in legal or commercial contexts and usually means withdrawal from an agreement, cancellation, or rescission.

Very often the full phrase is:

• odstąpienie od umowy = withdrawal from a contract

So formularz odstąpienia is probably short for something like:

• formularz odstąpienia od umowy = contract withdrawal form / cancellation form

This is formal, administrative language rather than casual conversation.

Because after w meaning in, Polish normally uses the locative case.

Base forms:

• przesyłka zwrotna = return shipment / return parcel / return mail item

After w, they change to locative:

• w przesyłce zwrotnej = in the return package / in the return shipment

So both words change:

• przesyłka → przesyłce
• zwrotna → zwrotnej

This is normal adjective-noun agreement in the locative case.

It literally means a return shipment, return parcel, or return mailing.

Depending on context, it could refer to:

• a package being sent back
• a return envelope
• a return consignment
• the parcel used for returning goods

So w przesyłce zwrotnej means that the form is inside the return package/shipment.

The exact English translation depends on the situation, but the Polish phrase is clear: it is something connected with returning goods or documents.

Yes, Polish often repeats jest in this kind of sentence, and that is completely normal.

• Oświadczenie jest gotowe, a formularz odstąpienia jest w przesyłce zwrotnej.

The repetition makes both clauses complete and clear.

You may sometimes hear omission in informal speech, especially when the structure is obvious, but here keeping jest in both parts sounds natural and standard.

So:

• repeated jest = normal, clear, slightly formal
• omitted jest = possible in some contexts, but less neutral here

No, Polish word order is fairly flexible, but the original order is the most neutral and natural.

Original:

• Oświadczenie jest gotowe, a formularz odstąpienia jest w przesyłce zwrotnej.

You could rearrange parts for emphasis, for example:

• Formularz odstąpienia jest w przesyłce zwrotnej, a oświadczenie jest gotowe.

That would shift attention to the form first.

However, because Polish uses case endings, grammar does not depend as heavily on word order as English does. Still, not every rearrangement sounds equally natural, so the original is a good standard version.

Oświadczenie is a noun, and it usually means something like:

• statement
• declaration
• formal notice

It is more formal than many everyday English words. In legal, official, or business contexts, oświadczenie is very common.

Grammatically:

• singular nominative: oświadczenie
• gender: neuter

That is why it goes with gotowe.

Because Polish does not have articles like English a/an and the.

So:

• oświadczenie can mean a statement or the statement
• formularz can mean a form or the form

The exact meaning depends on context.

In this sentence, the situation probably makes it clear which statement and which form are meant, so Polish does not need separate article words.

This is normal in Polish and in many other Slavic languages.

Yes, it sounds fairly formal or administrative.

Words like:

• oświadczenie
• formularz odstąpienia
• przesyłka zwrotna

are typical of business, customer service, legal, or official communication.

A more casual everyday conversation would often use simpler wording, but in customer support, return procedures, or contract-related messages, this style is very natural.

A rough pronunciation guide for an English speaker:

• oświadczenie ≈ osh-vyaht-CHEH-nyeh
• jest ≈ yest
• gotowe ≈ go-TOH-veh
• formularz ≈ for-MOO-lyash
• odstąpienia ≈ ot-stom-PYEH-nya
• przesyłce ≈ pshe-SIWL-tseh
• zwrotnej ≈ ZVROT-nej

A few useful pronunciation notes:

• ś/si is a soft sh-like sound
• cz sounds like ch in chop
• rz/ż usually sounds like the s in measure
• ą is a nasal vowel, often sounding roughly like om/on depending on context
• w is pronounced like English v

So w przesyłce zwrotnej begins roughly like v pshe-SIWL-tseh ZVROT-nej.