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lockbox (EN)
noun

noun “lockbox”

singular lockbox, plural lockboxes
  1. a box with a built-in lock, used to keep valuables safe
    She kept her important documents in a lockbox hidden under her bed.
  2. (in real estate) a small box that holds keys to a property, accessed with a code, allowing agents to show the property
    The realtor entered the code to open the lockbox and retrieve the house keys.
  3. (in banking) a service offered by banks to process payments on behalf of a company
    The business used a lockbox service to expedite the collection of customer checks.