जब भुगतान गलत हो, तब शिकायत दर्ज कीजिए।

जब ... तब is a correlative pair meaning when ... then.

So:

• जब भुगतान गलत ho = when the payment is wrong
• तब शिकायत दर्ज कीजिए = then file a complaint

In English, we often do not say then, but Hindi often likes this pairing. It gives the sentence a neat structure.

Here हो is used because the clause is more general or conditional in tone: when the payment is wrong / if the payment is wrong.

Compare:

• भुगतान गलत है। = The payment is wrong.
  This states a fact.

• जब भुगतान गलत हो... = When the payment is wrong...
  This sets up a condition or situation.

So हो here is a subjunctive-style form of होना that often appears in clauses with words like जब, अगर, चाहे, etc.

It can feel close to both, depending on context.

• जब usually means when
• But in instructions, when X happens, do Y can feel very similar to if X happens, do Y

So this sentence naturally works as:

• When the payment is wrong, file a complaint.
• Or in practical English: If there is an incorrect payment, please file a complaint.

Hindi often uses जब in places where English might choose either when or if, depending on style.

भुगतान means payment.

It is a somewhat formal word. You may see it in:

• banking
• customer service
• billing
• official notices
• websites and forms

In everyday speech, people might also use English-derived words like पेमेंट, especially in casual conversation.

गलत means wrong, incorrect, or mistaken.

In this sentence, भुगतान गलत हो means the payment is incorrect in some way, for example:

• wrong amount
• wrong recipient
• wrong transaction
• incorrect processing

So गलत is a very natural adjective here.

Literally:

• शिकायत = complaint
• दर्ज = registered / recorded
• कीजिए = polite imperative of करना (do)

So the phrase literally means something like:

• Please register a complaint
• Please record a complaint

In natural English, we would usually say:

• Please file a complaint
• Please lodge a complaint

This is a very common formal expression in Hindi.

Because शिकायत करना and शिकायत दर्ज करना are not exactly the same in tone.

• शिकायत करना = to complain
• शिकायत दर्ज करना = to officially register/file a complaint

So दर्ज adds the idea of an official record. That is why it is especially common in customer service, government, banking, and legal contexts.

कीजिए is a polite command form of करना.

So:

• दर्ज कीजिए = please register/file
• It is respectful and appropriate for instructions to the public

Some related forms:

• करो = informal command
• कीजिए / करिए = polite command
• करें = could be polite suggestion/imperative depending on context

In notices and official instructions, कीजिए sounds very natural.

Yes, often it can be omitted.

You could say:

जब भुगतान गलत हो, शिकायत दर्ज कीजिए।

This still sounds natural and means basically the same thing.

Adding तब makes the relationship clearer and a little more structured:

• जब X, तब Y = when X, then Y

So तब is not always necessary, but it is very common and stylistically neat.

Hindi word order is usually more flexible than English, but the default pattern is often Subject–Object–Verb.

Here the structure is:

• जब भुगतान गलत हो
• तब शिकायत दर्ज कीजिए

The verb usually comes at the end of each clause:

• हो
• कीजिए

That is why it does not match English word-for-word order.

A very literal arrangement would be something like:

• When payment wrong be, then complaint register please-do.

That sounds strange in English, but it reflects normal Hindi structure.

No explicit subject is needed here.

Hindi often leaves out pronouns when they are understood from the verb form and context.

In शिकायत दर्ज कीजिए, the polite command already implies you:

• (You) please file a complaint.

So the sentence does not need आप unless the speaker wants to make it explicit:

जब भुगतान गलत हो, तब आप शिकायत दर्ज कीजिए।

That is grammatical, but usually unnecessary.

Yes, you could say:

अगर भुगतान गलत हो, तो शिकायत दर्ज कीजिए।

That would mean:

• If the payment is wrong, please file a complaint.

This version sounds slightly more explicitly conditional.

Compare:

• जब ... तब ... = when ... then ...
• अगर ... तो ... = if ... then ...

In many practical contexts, both are fine, but अगर ... तो is often the clearer choice if you specifically want if.

दर्ज is used in a compound expression with करना.

In शिकायत दर्ज करना, it functions as part of the verbal idea to register/file a complaint.

This is very common in Hindi: a noun or adjective-like element combines with करना to make a full verb expression.

Examples of similar patterns:

• फ़ैसला करना = to decide
• घोषणा करना = to announce
• दर्ज करना = to record/register

So it is best to learn शिकायत दर्ज करना as a whole phrase.

It is fairly formal and polite.

Why it sounds formal:

• भुगतान is a formal word for payment
• शिकायत दर्ज करना is an official-style expression
• कीजिए is polite and respectful

This is the kind of sentence you might see in:

• a bank notice
• a customer service page
• an app help section
• an official instruction

In casual spoken Hindi, people might choose less formal wording.

A more everyday version might be:

अगर पेमेंट गलत हो, तो शिकायत कर दीजिए।

or

अगर पेमेंट में गड़बड़ी हो, तो शिकायत कीजिए।

These are a bit more conversational because:

• पेमेंट is a common borrowed word from English
• शिकायत करना is less official than शिकायत दर्ज करना
• गड़बड़ी can mean problem, mix-up, or error

But the original sentence is better for formal instructions.

A rough pronunciation guide:

• जब = jub
• भुगतान = bhug-taan
• गलत = guh-lut or galat depending on accent
• शिकायत = shi-kaa-yat
• दर्ज = darj
• कीजिए = kee-jee-eh

A few notes:

• भ is an aspirated b sound
• शि in शिकायत is like shi
• जिए in कीजिए is usually pronounced smoothly together, not as completely separate syllables

No visible change happens here.

गलत is one of those adjectives that usually stays the same in form:

• गलत भुगतान = wrong payment
• गलत बात = wrong thing/statement
• गलत फैसले = wrong decisions

So unlike some Hindi adjectives such as अच्छा / अच्छी / अच्छे, गलत does not normally change form.

That makes it easier to use.