Ця безконтактна оплата не потребувала ПІН-коду.

Because оплата is a feminine singular noun in Ukrainian.

• цей = this (masculine)
• ця = this (feminine)
• це = this (neuter)

Since оплата is feminine, the demonstrative must agree with it:

• ця оплата = this payment

Безконтактна literally means contactless.

It is built from:

• без- = without
• контакт = contact
• -на = adjective ending here, agreeing with a feminine noun

So безконтактна оплата = contactless payment.

Because оплата is feminine singular, the adjective also appears in the feminine singular form:

• безконтактний (masculine)
• безконтактна (feminine)
• безконтактне (neuter)

In the past tense, Ukrainian verbs agree with the subject in gender and number.

The subject here is оплата, which is feminine singular, so the verb takes the feminine past form:

• потребував = he/masculine thing required
• потребувала = she/feminine thing required
• потребувало = it/neuter required
• потребували = they required

So:

• Ця безконтактна оплата не потребувала...
  = This contactless payment did not require...

In Ukrainian, past tense negation is usually formed simply with не + verb.

So:

• потребувала = required
• не потребувала = did not require

Unlike English, Ukrainian does not need an extra helping verb like did in this sentence.

Because the verb потребувати normally takes the genitive case.

So:

• dictionary form: ПІН-код
• after потребувати: ПІН-коду

This is a very common learner question, because in English we say require a PIN code, where PIN code looks like a direct object. In Ukrainian, however, потребувати typically governs the genitive:

• потребувати часу = to require time
• потребувати допомоги = to require help
• потребувати ПІН-коду = to require a PIN code

It is singular.

The base noun is:

• ПІН-код = a PIN code

Here it appears in the genitive singular:

• ПІН-коду

It does not mean PIN codes. It means of a PIN code / a PIN code, depending on how the Ukrainian case maps into English.

Because ПІН-код is written as a compound term with an abbreviation plus a noun.

• ПІН is the abbreviation corresponding to PIN
• код = code

In Ukrainian, combinations like this are commonly written with a hyphen:

• SMS-повідомлення
• VIP-зала
• ПІН-код

When the word changes case, the second part changes, while the hyphen remains:

• nominative: ПІН-код
• genitive: ПІН-коду

Yes. That is a very natural English translation.

Depending on context, потребувати can correspond to:

• require
• need

So this sentence can be understood as:

• This contactless payment did not require a PIN code
• This contactless payment didn’t need a PIN code

Both are fine in English.

Yes, Ukrainian word order is relatively flexible, though the neutral order here is very natural:

• Ця безконтактна оплата не потребувала ПІН-коду.

This order presents the subject first, then the verb, then the object-like complement.

You could rearrange parts for emphasis, for example:

• ПІН-коду ця безконтактна оплата не потребувала.

That would sound more emphatic, something like:

• A PIN code, this contactless payment did not require.

But the original sentence is the most straightforward and neutral version.

Ukrainian has no articles like English a/an/the.

So Ukrainian simply says:

• ПІН-коду

Depending on context, English may translate this as:

• a PIN code
• the PIN code

Here the natural English rendering is a PIN code.

Usually yes, but the exact nuance depends on context.

Оплата often means:

• payment
• paying
• the act/process of payment

In this sentence, безконтактна оплата is best understood as contactless payment.

In real-life usage, Ukrainian might also use related expressions such as:

• безконтактний платіж
• безконтактна оплата

Both refer to contactless payment, though one may be more common than the other depending on context and speaker preference.

It would be:

• Ця безконтактна оплата не потребує ПІН-коду.

Compare:

• не потребувала = did not require / did not need
• не потребує = does not require / does not need

So the original sentence is specifically talking about a past situation.