הכחשת העסקה תתקבל בתנאי שהחיוב הלא מוכר חשוד.

הכחשת is the construct form of הכחשה.

• הכחשה = denial / dispute
• הכחשת העסקה = denial/dispute of the transaction

In Hebrew, when a noun is followed by another noun to mean X of Y, the first noun often changes into the construct state.
For many feminine nouns ending in ־ה, that ending becomes ־ת:

• הכחשה → הכחשת
• so: הכחשת העסקה = the dispute of the transaction

This is a very common pattern in formal Hebrew.

Because הכחשת העסקה is a construct chain.

In a construct chain, the first noun usually does not take the definite article ה־. The definiteness of the whole phrase is determined by the second noun.

So:

• הכחשת עסקה = a dispute of a transaction
• הכחשת העסקה = the dispute of the transaction

Even though הכחשת itself has no ה־, the whole phrase is definite because העסקה is definite.

Because its subject is הכחשת העסקה, and the head noun הכחשת is feminine singular.

• הכחשה is a feminine noun
• therefore the verb agrees with it
• תתקבל = will be accepted (feminine singular)

So the agreement is:

• הכחשת העסקה תתקבל
  The transaction dispute will be accepted

If the subject were masculine, the verb form would be different.

תתקבל is a future-tense Nifal form of the verb לקבל.

Here it means:

• will be accepted
• or more literally, will be received/accepted

The Nifal pattern often gives a passive or passive-like meaning.

So:

• לקבל = to receive / accept
• תתקבל = she/it will be accepted

Because the subject is feminine singular (הכחשת), the form is feminine singular future.

It means provided that, on condition that, or as long as.

So:

• בתנאי שהחיוב הלא מוכר חשוד
  = provided that the unfamiliar charge is suspicious

This is a fairly formal expression. It is stronger and more specific than just אם (if), because it suggests a condition that must be met.

Because in Hebrew, the verb to be is usually not expressed in the present tense.

So Hebrew says literally:

• the unfamiliar charge suspicious

but in natural English that becomes:

• the unfamiliar charge is suspicious

This is completely normal Hebrew.

Compare:

• החיוב חשוד = the charge is suspicious
• החיוב היה חשוד = the charge was suspicious
• החיוב יהיה חשוד = the charge will be suspicious

Only in past and future do you normally see forms like היה or יהיה.

Because the noun החיוב is definite, and the adjective phrase that describes it must also be definite.

• חיוב לא מוכר = an unfamiliar charge
• החיוב הלא מוכר = the unfamiliar charge

In Hebrew, adjectives that follow a definite noun usually also take the definite article.

With לא + adjective/participle, the article appears on the whole adjective phrase as הלא...

So:

• מוכר = familiar / known
• לא מוכר = unfamiliar / unknown
• הלא מוכר = the unfamiliar / the unknown

That is why the full phrase is החיוב הלא מוכר.

Yes, מוכר can mean different things depending on context.

Here, in החיוב הלא מוכר, it means:

• familiar / known / recognized

So:

• לא מוכר = unfamiliar / unknown / unrecognized

But in other contexts, מוכר can also be:

• seller
• or a verb form meaning sells

Hebrew often uses the same written form for different meanings, so context matters a lot. In this sentence, because it describes חיוב (charge), the meaning is clearly unfamiliar / unrecognized.

They are related, but not identical.

• עסקה = transaction / purchase / deal
• חיוב = charge / debit / billing entry

In payment or credit-card contexts:

• עסקה is the transaction itself
• חיוב is the charge that appears on the account or card statement

So the sentence first talks about disputing the transaction, and then gives a condition about the charge being unfamiliar and suspicious.

English often uses transaction and charge almost interchangeably in banking contexts, but Hebrew can distinguish between them more clearly.

חשוד means suspicious or suspected.

In this sentence, the most natural meaning is:

• suspicious
• possibly appears suspicious

It agrees with חיוב, which is masculine singular:

• חיוב — masculine singular
• חשוד — masculine singular adjective

If the noun were feminine, the adjective would change, for example to חשודה.

Yes. It is normal, especially in formal or administrative Hebrew.

Structure:

• הכחשת העסקה תתקבל
  subject + verb
• בתנאי ש...
  conditional phrase: provided that...

Also, Hebrew normally places adjectives after the noun:

• החיוב הלא מוכר
• חיוב חשוד

So the sentence sounds formal and official, which fits banking or customer-service language.

Yes, very much so.

Several things make it sound formal or bureaucratic:

• הכחשת העסקה instead of a simpler everyday wording
• תתקבל in a passive/formal register
• בתנאי ש־ meaning provided that
• the precise financial terms עסקה and חיוב

A more conversational Hebrew sentence might be phrased differently, but this version is exactly the kind of wording you might see in a bank, credit-card company, or official form.