Compound nouns: the last word decides
Unterschrift die
Always In 98.9% of 6,721 common compound nouns, the article comes from the last word.
The last part decides the article: die Schrift, so die Unterschrift.
die Unterschrift
It's die Unterschrift. Unterschrift is feminine, plural die Unterschriften.
Hier fehlt die Unterschrift.
The signature is missing here.
Unterschrift die
Always In 98.9% of 6,721 common compound nouns, the article comes from the last word.
The last part decides the article: die Schrift, so die Unterschrift.