Using 'hand in' often implies there's a set deadline for when something should be submitted.

Deadline Implication

'Hand in' suggests submission to someone in charge, like a teacher, boss, or official.

Authority Figure

It often involves a physical act of giving a document or item directly to someone.

Using 'hand in' in a job context usually refers to a formal notice when leaving a position.

'Hand in' implies that the resignation or notice is often given in a written form.

'Hand in' can also be a way to ask for compliance, like surrendering items to authorities.

It implies relinquishing control of something you own, often for safety or procedural reasons.