إثبات العنوان في الاستمارة.

Not really. It is most naturally a phrase, not a full sentence.

In Arabic, phrases like this are very common as:

• form labels
• section headings
• administrative instructions
• document titles

So this can function like English headings such as:

• Address verification on the form
• Proof of address in the form
• Entering/confirming the address on the form
  (depending on context)

A full sentence would usually need more structure, such as a verb or a clearer predicate.

إثبات means proof, verification, confirmation, or establishing.

It is a verbal noun (called a maṣdar) from the verb أثبت, which means to prove, to confirm, to establish, or to verify.

So in this phrase, إثبات gives the sense of:

• proving
• verifying
• confirming

In official or bureaucratic language, it often sounds like verification or proof.

This is because إثبات العنوان is working like an iḍāfa construction, or at least very much like one in practice.

In إثبات العنوان:

• إثبات = the first part
• العنوان = the second part

In an iḍāfa:

• the first noun usually does not take ال
• the second noun can be definite with ال
• the whole phrase becomes definite if the second noun is definite

So:

• إثبات العنوان = the verification/proof of the address

That is why you do not say الإثبات العنوان here.

Yes, it is best understood that way.

Literally, it is something like:

• verification of the address
• proof of the address

This is a very common Arabic pattern:

• كتابة الرسالة = writing the letter
• قراءة الكتاب = reading the book
• إثبات العنوان = verifying/proving the address

So العنوان is tied to إثبات in a compact noun + noun structure that English often translates with of.

Because it follows إثبات in this iḍāfa-like construction.

In Arabic, the second noun in an iḍāfa is normally genitive.

So in full vocalization, you would expect:

• إثباتُ العنوانِ في الاستمارةِ

Here:

• إثباتُ = nominative, if treated as the heading or main noun
• العنوانِ = genitive, because it is the second part of the iḍāfa
• الاستمارةِ = genitive, because it comes after the preposition في

In everyday unvowelled writing, you usually do not see these endings.

Arabic uses في very naturally for this kind of context.

في usually means:

• in
• inside
• within

But when translating into English, it may correspond to either:

• in the form
• on the form

English often says on the form, while Arabic commonly says في الاستمارة.

So this is a good example of a place where translation is not always word-for-word.

الاستمارة means the form.

It usually refers to an official document that you fill out, such as:

• an application form
• a registration form
• an administrative form

So في الاستمارة means something like:

• in the form
• on the form
• within the form/document

Yes. العنوان can also mean title or heading, depending on context.

For example:

• in a book or article, العنوان often means title
• in personal information, it usually means address

Here, because of the administrative context and الاستمارة, the intended meaning is almost certainly address.

A careful pronunciation would be:

ʾithbātu l-ʿunwāni fī l-istimārati

A simpler learner-friendly breakdown:

• إثبات = ith-baat
• العنوان = al-ʿun-waan
• في = fii
• الاستمارة = al-is-ti-maa-ra

A few pronunciation notes:

• ث in إثبات sounds like th in think
• ع in العنوان is a deep Arabic sound with no exact English equivalent
• long vowels matter:
  • با in إثبات
  • وا in العنوان
  • ما in الاستمارة

Because in an iḍāfa construction, the first noun does not take tanwīn.

Compare:

• إثباتٌ = a proof / a verification
• إثباتُ العنوانِ = proof/verification of the address

Once إثبات is linked to العنوان, it loses tanwīn.

This is one of the key signs of iḍāfa.

If you fully vowel the phrase as a heading or standalone label, the most natural form is:

• إثباتُ العنوانِ في الاستمارةِ

Here إثباتُ is nominative.

However, in real-life signage, forms, and headings, case endings are usually not written, and speakers often do not pronounce them in pause.

So in practice, learners usually just read:

• إثبات العنوان في الاستمارة

without worrying too much about the final short vowels unless they are studying formal grammar.

The basic sense of إثبات is more like:

• proof
• verification
• confirmation
• establishing

So it is closer to proof/verification of the address than simply writing the address.

If Arabic wanted to clearly express writing down the address, it might use something like:

• كتابة العنوان
• تسجيل العنوان

So إثبات العنوان has a more official, documentary, or verification-related tone.

Yes, very much so.

Arabic administrative language often uses compact noun phrases like this instead of full sentences. Examples include structures like:

• تسجيل الاسم = registration of the name / entering the name
• إرفاق المستندات = attaching the documents
• إثبات الهوية = proof of identity
• إثبات العنوان = proof/verification of address

So this phrase sounds quite normal in official Modern Standard Arabic.