L'ordenant escriu l'IBAN.

Because l' is the shortened form of the definite article el or la before a word beginning with a vowel or mute h.

So:

• el ordenant → l'ordenant
• la ordenant → l'ordenant

In this sentence, l'ordenant means the ordering party / the payer / the person giving the payment order.

You often cannot tell from the article alone when it is shortened to l'. You need context.

For example:

• L'ordenant està identificat → masculine
• L'ordenant està identificada → feminine

In banking language, ordenant can refer to a man or a woman, depending on who is making the transfer or order.

In general Catalan, ordenant is not one of the first everyday words learners meet. In banking and administrative language, it usually means the person or entity that gives the order, especially a payment order.

So in this context it is something like:

• the payer
• the originator
• the ordering party
• the person making the transfer

The most natural English translation depends on the banking context.

Because Catalan usually does not require subject pronouns when the verb ending already shows the person.

• escriu = he/she/it writes or you (formal) write

Since the noun l'ordenant is already the subject, adding a pronoun would be unnecessary:

• L'ordenant escriu l'IBAN. = The ordering party writes the IBAN.

This is normal in Catalan and in other Romance languages.

Escriu is the 3rd person singular present indicative of escriure (to write).

So it can mean:

• he writes
• she writes
• it writes
• the ordering party writes

Here it agrees with the singular subject l'ordenant.

This is the normal neutral Catalan word order:

• Subject + Verb + Object

So:

• L'ordenant = subject
• escriu = verb
• l'IBAN = direct object

Catalan can change word order for emphasis, but this sentence is the standard, straightforward order.

For the same reason as with ordenant: the definite article is shortened before a vowel sound.

• el IBAN → l'IBAN

Catalan often uses the article before acronyms and initials when they function like nouns in the sentence.

So l'IBAN simply means the IBAN.

Because IBAN is an acronym: International Bank Account Number.

Acronyms are normally written in capitals in Catalan too. The article is added separately:

• l'IBAN
• un IBAN
• aquest IBAN

The apostrophe itself is just spelling; it shows that the vowel of the article has been dropped.

You pronounce it as the article attached to the following word, roughly:

• l'IBAN ≈ lee-ban / li-ban, depending on accent and speech rhythm

The important point for a learner is that you do not pronounce a full separate el before it.

Yes. Escriure is the normal verb for to write, including writing information on a form, document, or screen.

So in this sentence, escriu l'IBAN can mean:

• writes the IBAN
• fills in the IBAN
• enters the IBAN

In practical contexts such as banking forms, English might sometimes prefer enter or fill in, but Catalan still commonly uses escriure.

Yes, depending on the situation.

• escriure l'IBAN = write the IBAN
• posar l'IBAN = put/enter the IBAN

In instructions on forms or websites, posa is also common and can sound very natural.
But escriu l'IBAN is perfectly correct if the action is literally writing or entering it.

It sounds fairly neutral-to-formal, especially because of the word ordenant, which is typical of banking or administrative language.

Nothing in the grammar is especially formal, but the vocabulary belongs to an official or financial context rather than everyday conversation.

The infinitive is escriure.

It is somewhat irregular in its forms, so it is worth learning as a verb pattern. For example:

• jo escric = I write
• tu escrius = you write
• ell/ella escriu = he/she writes
• nosaltres escrivim = we write
• vosaltres escriviu = you plural write
• ells/elles escriuen = they write

So escriu is one member of that conjugation pattern.

Sometimes yes, but that depends on context.

If everyone already knows what is being written, Catalan could omit the object:

• L'ordenant escriu. = The ordering party writes / is writing.

But in a form or instruction context, keeping l'IBAN is clearer and more natural because it specifies exactly what must be written.