Memur, eksik belge için yeni bir dilekçe yazmamı istedi.

Eksik belge için means for the missing document or regarding the missing document.

• eksik = missing, incomplete
• belge = document
• için = for

Here, için shows the reason or purpose: the new petition is needed for the missing document issue.

So the phrase means something like:

• because of the missing document
• for the missing document
• in relation to the missing document

Dilekçe is a very common Turkish administrative word. It means a formal written petition, written request, or official application letter addressed to an institution.

It is not just any letter. It is usually something formal that you submit to an office, school, university, municipality, or government institution.

Both are possible, but yeni bir dilekçe is the more natural way to say a new petition.

• yeni = new
• bir = a / one
• dilekçe = petition

Using bir makes it clearly indefinite, like English a. Turkish does not always need bir, but it is often used when introducing a singular countable noun naturally.

So:

• yeni bir dilekçe = a new petition
• yeni dilekçe = new petition

The version with bir sounds more complete and natural here.

Yazmamı is a very important structure in Turkish. It breaks down like this:

• yaz- = write
• -ma = verbal noun marker
• -m = my
• -ı = accusative case

So yazmamı literally means my writing, but in this sentence it functions as me writing or that I write.

In natural English, the whole structure means:

• asked me to write
• literally: wanted my writing

This is a common Turkish pattern:

• gitmemi istedi = he/she wanted me to go
• gelmeni söyledi = he/she told you to come
• beklemesini istedim = I wanted him/her to wait

That final -ı is the accusative case ending.

The verb istemek often takes this kind of verbal noun phrase as its object. So in:

• yazmamı istedi

the thing that was wanted/requested is yazmamı = my writing / me to write.

Without going too deeply into grammar labels, you can think of it this way:

• yazmam = my writing
• yazmamı = my writing as the object of the verb

That is why the accusative appears.

Because of the -m inside yazmamı.

Compare:

• yazmamı = my writing / me writing
• yazmanı = your writing / you writing
• yazmasını = his/her writing / him/her writing
• yazmamızı = our writing / us writing

So the person who is supposed to do the action is built directly into the verb form.

In this sentence, yazmamı istedi means:

• he/she asked me to write
• he/she wanted me to write

Yes. Although istemek basically means to want, it is also very commonly used in Turkish in the pattern:

• birinden bir şey yapmasını istemek

which means:

• to ask someone to do something
• literally: to want someone to do something

So:

• Memur ... yazmamı istedi = The clerk asked me to write ...

This is very natural Turkish. English often uses ask, while Turkish often uses istemek in this kind of structure.

Grammatically, that is closer to the Turkish structure, but it is not natural English.

A more literal breakdown is:

• Memur = the clerk
• eksik belge için = for the missing document
• yeni bir dilekçe = a new petition
• yazmamı = my writing / me to write
• istedi = wanted / asked for

But in natural English, the best translation is:

• The clerk asked me to write a new petition for the missing document.

So yes, the Turkish structure is more noun-like internally, but you should translate it with an English infinitive clause: asked me to write.

Turkish word order is usually Subject + Object + Verb, while English is usually Subject + Verb + Object.

Here:

• Memur = subject
• eksik belge için yeni bir dilekçe yazmamı = object
• istedi = verb

So Turkish puts the main verb at the end:

• Memur ... istedi.

That is completely normal.

Also, the longer phrase before the final verb contains the thing that was requested:

• eksik belge için yeni bir dilekçe yazmamı

This kind of long object-before-verb structure is very common in Turkish.

Not really. The sentence works perfectly well without it:

• Memur eksik belge için yeni bir dilekçe yazmamı istedi.

The comma may reflect a slight pause in writing, but it is not grammatically required in ordinary Turkish. In most cases, learners can safely write it without the comma.

Yes, there are several possible alternatives, depending on nuance.

For example:

• Memur, eksik belgeyle ilgili yeni bir dilekçe yazmamı istedi.
  = The clerk asked me to write a new petition regarding the missing document.

• Memur, eksik belge için yeniden dilekçe yazmamı istedi.
  = The clerk asked me to write the petition again / write a petition anew for the missing document.

• Memur benden eksik belge için yeni bir dilekçe yazmamı istedi.
  = The clerk asked me to write a new petition for the missing document.

Adding benden makes the from me / me specifically idea more explicit, though it is not necessary because yazmamı already shows that.

A very useful pattern is:

[person] + [verb-noun + possessive + accusative] + istemek

Examples:

• Gitmemi istedi.
  = He/she asked me to go.

• Beklemeni istedim.
  = I asked you to wait.

• Gelmesini istiyoruz.
  = We want/ask him/her to come.

So this sentence is a great example of how Turkish says:

• ask someone to do something
• want someone to do something

using a verbal noun with a possessive ending.