Spanish often omits subject pronouns when they are already clear from the verb form.
Since leí already means I read, you do not need yo.
So both are possible:
Adding yo usually gives extra emphasis or contrast, such as:
Albarán is a business or commercial term used especially in Spain. It usually refers to a:
It is the document that lists goods delivered.
It is not exactly the same as:
This is a very useful Spain-specific word, especially in work, shipping, sales, or administration contexts.
Because leí presents the action as a completed event in the past.
Compare:
Leí el albarán.
I read the delivery note.
→ a finished action
Leía el albarán.
I was reading / I used to read the delivery note.
→ ongoing or habitual in the past
He leído el albarán.
I have read the delivery note.
→ past action with present relevance
In Spain, he leído is often used for recent past events, but leí is the normal simple past for a completed action.
Leer is not completely regular in all tenses, but this form follows an important pattern.
In the preterite, the singular and nosotros/vosotros forms keep the written í:
Notice that some forms use y:
This happens because of the vowel combination. So leí is the correct preterite form for I read.
No. This is the most normal Spanish word order:
Spanish often uses verb + object in simple statements like this.
You could also say:
But the version without yo is more natural unless you want emphasis.