İster fotoğraf kaydını ister tebligatı sunun, belge numarasını yazın.

It presents two alternatives and means whether ... or ... or either ... or ....

So İster fotoğraf kaydını ister tebligatı sunun means that either option is acceptable, and the same action sunun applies to both.

Not in the usual sense. Although it is historically related to istemek, in this pattern ister ... ister ... works like a fixed connector.

So here it does not mean he/she wants. It functions more like whether ... or ....

No, one sunun is enough. In Turkish, if the same verb applies to both alternatives, it is often stated only once.

So:

• İster fotoğraf kaydını ister tebligatı sunun

naturally means:

• Submit either the photo record or the notification

The verb is understood with both nouns.

They are direct objects of sunun, and they are definite/specific, so they take the accusative case.

That is why you get:

• fotoğraf kaydı → fotoğraf kaydını
• tebligat → tebligatı

In Turkish, definite direct objects usually take the accusative.

Because the base expression is fotoğraf kaydı, which is a noun compound.

Here is the breakdown:

• kayıt = record
• fotoğraf kaydı = photo record

In this compound, kayıt becomes kaydı. The t softens to d before the vowel-involving ending. Then the accusative is added:

• fotoğraf kaydı
  • -nı → fotoğraf kaydını

So kaydını is the correct form.

Because belge numarası is also a noun compound.

Compare:

• numara = number
• belge numarası = document number

The second noun in this kind of compound usually takes a compound ending, so it becomes numarası, not just numara. Then, because it is the definite direct object of yazın, it also takes the accusative:

• belge numarası → belge numarasını

They are imperative forms addressed to siz.

That means they are used for:

• polite singular you
• plural you

So they mean:

• sunun = submit / present
• yazın = write

This is a very common style in official instructions, forms, and notices.

Yes. Turkish often leaves out subject pronouns when the verb already shows who the subject is.

Here, the implied subject is siz:

• (Siz) ister fotoğraf kaydını ister tebligatı sunun, belge numarasını yazın.

English usually needs you, but Turkish often does not.

Because Turkish normally prefers verb-final word order.

So these parts follow a very common Turkish pattern:

• tebligatı sunun
• belge numarasını yazın

The object comes before the verb. Turkish word order can be flexible for emphasis, but verb-final order is the basic pattern here.

The comma separates two instructions:

1. submit one of the two items
2. write the document number

So the sentence gives two linked commands:

• first: İster fotoğraf kaydını ister tebligatı sunun
• second: belge numarasını yazın