Заявитель получит дубликат по истечении недели.

Получит is the future tense of the perfective verb получить (to receive / to obtain).

In Russian, perfective verbs do not have a present tense in the usual sense. Forms like получит refer to a completed future action:

• получать = imperfective, to be receiving / to receive regularly
• получить = perfective, to receive once, successfully

So Заявитель получит дубликат means The applicant will receive the duplicate, with the idea of a single completed event.

If you used получает, that would be present tense of the imperfective verb and would mean something like is receiving or receives (habitually), which does not fit this sentence.

Yes, дубликат is the direct object, so it is in the accusative case.

However, for many masculine inanimate nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: дубликат
• accusative: дубликат

That is why there is no visible change.

Compare:

• Я вижу стол = I see a table
• Я получу дубликат = I will receive a duplicate

But with an animate masculine noun, the accusative would usually match the genitive instead.

По истечении is a formal expression meaning:

• after
• upon the expiration of
• once ... has elapsed

So по истечении недели means after a week has passed or more literally upon the expiration of a week.

This is a very common phrase in official, legal, and bureaucratic Russian.

Examples:

• по истечении срока = after the term/deadline has expired
• по истечении месяца = after a month has passed
• по истечении недели = after a week has passed

It sounds much more formal than everyday alternatives like через неделю.

That is a very good question, because по often does take the dative.

However, in some fixed expressions, especially formal ones, по can be used with the prepositional case. По истечении is one of those standard expressions.

So here:

• истечение = expiration / lapse / elapsing
• prepositional singular = истечении

Thus:

• по истечении = after the expiration of / after ... has elapsed

You should mainly learn this as a fixed phrase:

• по истечении срока
• по истечении недели
• по истечении 30 дней

It is more natural to memorize the whole pattern than to try to build it from scratch each time.

Недели is in the genitive singular because it depends on the noun истечение.

Literally, the phrase means something like:

• the expiration of a week

In Russian, nouns like истечение often take another noun in the genitive to show of what:

• истечение срока = expiration of the term
• истечение времени = passing of time
• истечение недели = expiration of a week

So in по истечении недели, the structure is:

• по истечении = upon the expiration
• недели = of a week

Not quite.

Both can often be translated as in a week / after a week, but the tone and nuance are different:

• через неделю = normal everyday way to say in a week
• по истечении недели = formal, official, bureaucratic way to say after a week has elapsed

So:

• Я вернусь через неделю = I’ll come back in a week
  (neutral, everyday)
• Заявитель получит дубликат по истечении недели
  (official/formal: the duplicate will be issued after a week has passed)

Also, по истечении недели emphasizes that the action happens once the full week is over.

Заявитель is a formal noun meaning something like:

• applicant
• claimant
• person submitting a request/application

The exact English translation depends on context. In official paperwork, заявитель is often the person who has filed an application, request, or claim.

It is a typical bureaucratic word, so it fits well with the formal phrase по истечении недели.

Yes, very much so.

Several things make it sound official:

• заявитель instead of a more everyday word for a person
• дубликат in an administrative/document context
• по истечении недели instead of the simpler через неделю

This sounds like something you might read in:

• an official notice
• a government document
• administrative instructions
• a legal or institutional text

In everyday speech, a Russian speaker would more likely say something simpler, such as:

• Заявитель получит дубликат через неделю.
• Дубликат можно будет получить через неделю.

Yes. Russian word order is flexible, though different orders can sound more natural in different contexts.

The original sentence:

• Заявитель получит дубликат по истечении недели.

is a neutral official word order.

Other possible orders include:

• По истечении недели заявитель получит дубликат.
  This puts the time phrase first for emphasis: After a week has passed, the applicant will receive the duplicate.

• Дубликат заявитель получит по истечении недели.
  This emphasizes дубликат.

In official writing, the original version is very natural and straightforward.

Russian has no articles like English a/an and the.

So:

• заявитель can mean the applicant or an applicant
• дубликат can mean the duplicate or a duplicate

Which one is meant depends on context.

In this sentence, English would usually use the because it sounds like a specific official document already known in context:

• The applicant will receive the duplicate after a week has passed.

But Russian does not need any article to express that.

Yes, that is exactly the implication.

По истечении недели suggests that the duplicate becomes available once the week has fully passed. It implies a waiting period.

So the sentence does not just locate the event in the future; it also suggests a condition in time:

• first, the week passes
• then, the applicant receives the duplicate

That is why this phrase is common in official procedures and deadlines.