Переплату вернут при условии, что мы передадим показания счётчика.

Because переплату is the direct object of вернут.

The dictionary form is переплата. Since it is a feminine noun ending in -а, its singular accusative form is переплату.

• nominative: переплата
• accusative: переплату

So here it means the overpayment as the thing that will be returned/refunded.

Вернут is the 3rd person plural future form of вернуть.

In this sentence it means will return or, more naturally in English, will refund.

A very important point: Russian often uses a 3rd person plural verb with no stated subject when the doer is unspecified but understood from context, especially in official or everyday language.

So Переплату вернут is like:

• They will refund the overpayment
• The overpayment will be refunded

The sentence does not name who they are, but it is understood to be the company, service provider, office, etc.

Not necessarily. Russian often leaves out the subject when it is obvious or unimportant.

In official or administrative language, this is very common. The focus is on the action, not on naming the institution again.

So:

• Переплату вернут = They will refund the overpayment
• implied subject = the relevant organization

This sounds natural in Russian.

При условии, что means on condition that, provided that, or as long as. It is more formal and more typical of official language than если.

Compare:

• если мы передадим показания счётчика = if we submit the meter readings
• при условии, что мы передадим показания счётчика = provided that we submit the meter readings

So the sentence sounds a bit bureaucratic or administrative, which fits utility/payment contexts very well.

Because что introduces a subordinate clause.

In the expression при условии, что, the part after что is the condition clause:

• мы передадим показания счётчика

Russian normally separates this kind of subordinate clause with a comma.

So:

• при условии, что мы передадим...

is the standard punctuation.

Передадим is the future tense of the perfective verb передать.

Russian uses the perfective future here because it refers to a single completed action in the future: submitting the meter readings.

So the idea is:

• once we submit the readings
• if we do submit them
• provided that we submit them

Using передаём would mean present tense, which does not fit here.

Using будем передавать would suggest an ongoing process, but this sentence is about a one-time completed act, so передадим is the natural choice.

That is a very common question for English speakers.

In Russian, after words like если, когда, or при условии, что, a future situation can still use a future verb form. Russian does not avoid the future here the way English often does.

So Russian says:

• при условии, что мы передадим...

Literally this looks like on condition that we will submit..., but that is just how Russian grammar works. In natural English, you usually translate it as provided that we submit...

Because показания is the normal Russian word for readings in this context.

With meters, Russian usually says:

• показания счётчика
• передать показания

Even if English sometimes says meter reading in the singular, Russian commonly uses the plural noun показания.

This is just the standard collocation.

Счётчика is the genitive singular form of счётчик, meaning meter or counter.

The phrase показания счётчика literally means the readings of the meter.

So:

• показания = readings
• счётчика = of the meter

That is why the genitive is used.

It is a fixed, very common expression in utility/service language.

It means:

• to submit the meter readings
• to report the meter readings
• to send in the meter readings

It does not mean physically handing the meter to someone. It means giving the numbers from the meter to the company.

Yes, but mainly for emphasis and style, not basic meaning.

Russian word order is more flexible than English. Starting with Переплату puts the focus on the overpayment itself.

So Переплату вернут feels a bit like:

• As for the overpayment, it will be refunded
• The overpayment will be refunded

This word order is very natural in formal or administrative Russian.

Yes. In Russian, ё is often written as е in ordinary texts, even though the pronunciation is different.

So you may see:

• счётчика
• счетчика

Both usually mean the same word.

But the correct pronunciation is with ё, and the stress is on that syllable:

• счЁтчик
• счЁтчика

For learners, it is very helpful to remember the ё, even if native texts sometimes omit the dots.