hinterlegen
to leave / deposit
To leave something in a safe place for storage or for someone to pick up.
Sie können den Schlüssel für das Apartment an der Rezeption hinterlegen.
You can leave the key for the apartment at reception.

to deposit / store
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to leave / deposit
To leave something in a safe place for storage or for someone to pick up.
Sie können den Schlüssel für das Apartment an der Rezeption hinterlegen.
You can leave the key for the apartment at reception.

'Hinterlegen' is an inseparable verb. The prefix 'hinter-' remains firmly attached to the verb in all sentence forms and tenses and is not placed at the end of the sentence.
Er hat seinen Ausweis als Pfand hinterlegt.
He deposited his ID as collateral.
The structure is usually: subject + hinterlegen + accusative object + location. The accusative object is what is being deposited or left, and the location tells where it is deposited or left.
Ich habe die Unterlagen für Sie im Sekretariat hinterlegt.
I left the documents for you in the office.
In this meaning, the verb is often used with physical objects that you leave somewhere for someone. Typical phrases are: 'einen Schlüssel hinterlegen' (to leave a key), 'eine Nachricht hinterlegen' (to leave a message), or 'ein Paket hinterlegen' (to leave a package).
Könnten Sie bitte eine Nachricht für Frau Meier an der Rezeption hinterlegen?
Could you please leave a message for Ms. Meier at reception?
This meaning is very common in the digital age. You store information in a system. Typical combinations are: 'Daten hinterlegen' (to store data), 'eine E-Mail-Adresse hinterlegen' (to store an email address), or 'eine Lieferadresse hinterlegen' (to store a delivery address).
Für die Registrierung müssen Sie Ihre Kontaktdaten hinterlegen.
For registration, you must store your contact details.
In a financial or legal context, 'hinterlegen' often means to provide security. Common combinations are: 'eine Kaution hinterlegen' (to deposit a security deposit), 'eine Bürgschaft hinterlegen' (to provide a guarantee), or 'einen Geldbetrag hinterlegen' (to deposit a sum of money).
Der Mieter muss vor dem Einzug eine Kaution beim Vermieter hinterlegen.
The tenant must deposit a security deposit with the landlord before moving in.
to record / grasp
'erfassen' and 'hinterlegen' can both have to do with data in a system. 'erfassen' describes collecting and entering data. 'hinterlegen' means that data is stored there so that it can be used or checked later. The words can be confused because when data is recorded, it is often also stored in the system. The difference is the focus: 'erfassen' emphasizes capturing or recording the data, while 'hinterlegen' emphasizes storing it in a specific place in the system.

Wir hinterlegen deine E-Mail-Adresse, damit du die Bestätigung bekommst.
We store your email address so that you receive the confirmation.
Das Team erfasst die Lieferadresse im Bestellsystem.
The team records the delivery address in the ordering system.