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High Court Rules WhatsApp Messages Not Legal Signatures

1/16/2026

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Summary

Story summary

The High Court ruled that WhatsApp messages did not constitute a legal signature in Hsiao Mei-Lin (claimant) against Audun Mar Gudmundsson (ex-husband) over £1.5 million home.
Justice Cawson said the sender header is incidental and does not form part of the message.
The judge found no evidence Gudmundsson intended to relinquish his share.
The messages were part of ongoing divorce negotiations.
Ms. Hsiao Mei-Lin must vacate the property by July 31, 2027.

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Story summary

The High Court ruled that WhatsApp messages did not constitute a legal signature in Hsiao Mei-Lin (claimant) against Audun Mar Gudmundsson (ex-husband) over £1.5 million home.
Justice Cawson said the sender header is incidental and does not form part of the message.
The judge found no evidence Gudmundsson intended to relinquish his share.
The messages were part of ongoing divorce negotiations.
Ms. Hsiao Mei-Lin must vacate the property by July 31, 2027.