There is no single fixed retention period for an entire completed home sale file in the cited materials. For personal data, the stated principle is to keep it only as long as necessary for its purpose; the public availability of registered documents does not establish an automatic deletion date for every record.
What the official guidance establishes
| Material | What the source says | What a seller can take from it |
|---|---|---|
| Personal data | The Privacy Commissioner for Personal Data says personal data should not be kept longer than necessary for the fulfilment of its purpose. | Each item should be reviewed against the reason it is being retained. The guidance does not provide a fixed number of years. |
| Registered documents | The Hong Kong Land Registry says imaged copies of registered documents are open for public search. | A publicly searchable copy may be available, but that alone does not show that every transaction record can be discarded. |
These are separate considerations. Public access to a registered document may answer whether an official copy can be obtained again, while the privacy principle concerns whether personal data remains necessary for its stated purpose.
How to check the file before removing anything
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Review the file item by item. A completed-sale file may contain different kinds of records, and one retention decision should not automatically apply to all of them.
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Identify the purpose of personal data. The seller should be able to explain why each relevant item is being kept and whether that purpose has been fulfilled. Neither cited source supplies a universal period for this assessment.
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Check public availability for registered documents. The Land Registry’s public search service can be used to confirm whether an imaged copy is available. A seller should still check whether that copy meets the intended evidential or recordkeeping need.
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Check for separate requirements. Any applicable contract, legal requirement, official rule or other documented obligation may affect a particular record. The cited materials do not state whether such a requirement applies or how long it would require the seller to retain that record.
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Do not treat public searchability as permission to delete everything. It addresses access to registered documents, not the purpose of other records or the retention of personal data.
What the seller must still confirm
The final retention period depends on the document and the reason for keeping it. The seller must confirm whether a separate requirement prescribes a period or triggering event, and whether a publicly searchable copy is sufficient for the relevant purpose.
Neither cited source answers those document-specific questions. If the applicable requirement is unclear, it should be confirmed before the record is discarded.