Breakdown of Schreiben Sie bitte Ihren Vornamen hier.
hier
here
Sie
you (formal)
schreiben
to write
Ihren
your (formal, accusative masculine)
Questions & Answers about Schreiben Sie bitte Ihren Vornamen hier.
Why does the word "Vorname" have an extra "-n" at the end (Vornamen)?
The word der Vorname belongs to a special group of masculine nouns known as "weak nouns" or "n-declension". Whenever these nouns are used as a direct object (accusative case) or indirect object (dative case), they get an extra -n or -en at the end. Since the name is what is being written here, it is the direct object.
Why is the verb Schreiben at the very beginning of the sentence?
This sentence is a formal command or instruction. To politely tell someone to do something, you put the infinitive verb at the beginning of the sentence and follow it directly with the formal "you" pronoun, Sie.
Why is Ihren capitalized and why does it end in -en?
It is capitalized because it means "your" in the polite, formal form, which matches the formal pronoun Sie. It ends in -en because it is describing a masculine noun (der Vorname) that is acting as the direct object (accusative case) in this sentence.
Could I put hier earlier in the sentence?
Yes, German word order is flexible. You could also say Schreiben Sie hier bitte Ihren Vornamen. Putting hier at the very end of the sentence is just a natural way to strongly emphasize exactly where the person needs to write.