handschriftlich
handwritten
Written by hand, as opposed to machine-produced text such as typed or printed text.
Für die Bewerbung war ein handschriftlicher Lebenslauf erforderlich.
A handwritten résumé was required for the application.

handwritten
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handwritten
Written by hand, as opposed to machine-produced text such as typed or printed text.
Für die Bewerbung war ein handschriftlicher Lebenslauf erforderlich.
A handwritten résumé was required for the application.

The word is derived from 'die Handschrift' (handwriting) and becomes an adjective with the ending '-lich'. So it describes something that has the quality of handwriting.
Ihre handschriftlichen Notizen sind immer sehr ordentlich.
Her handwritten notes are always very neat.
As an adjective, 'handschriftlich' (handwritten) typically describes nouns such as 'Notiz' (note), 'Brief' (letter), 'Lebenslauf' (résumé/CV), 'Vermerk' (note/remark), or 'Unterschrift' (signature).
Bitte fügen Sie dem Dokument eine handschriftliche Notiz bei.
Please attach a handwritten note to the document.
'Handschriftlich' (handwritten/by hand) can also be used as an adverb to describe a verb. It then answers the question 'How?'. Typical verbs are 'ausfüllen' (to fill out), 'korrigieren' (to correct), or 'ergänzen' (to add/supplement).
Das Formular muss handschriftlich ausgefüllt werden.
The form must be filled out by hand.
written
'schriftlich' and 'handschriftlich' can both mean that something exists as text. The difference is the way it is written. 'schriftlich' only means: not oral, but written. That can also be typed, printed, or digital. 'handschriftlich' is more specific: written by hand. The words can be confused because every handwritten text is also written. But not every written text is handwritten.

Auf dem Formular muss die Unterschrift handschriftlich sein.
On the form, the signature must be handwritten.
Am Abend schickt er seine Antwort schriftlich per Nachricht.
In the evening, he sends his answer in writing by message.