National Insurance alerts have sparked panic among Brits who sell their clothes online. Vinted users who were trying to make extra cash by selling their second-hand items feared they had inadvertently impacted their taxable income.

Users who had sold more than 30 items or made £1,700 in a year reported receiving notifications that asked for their NI number as "required by UK law". Sellers have taken to TikTok and Instagram to share screenshots of the notification and ask whether they will be hit by a huge tax bill.

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One user posted on Reddit : "Vinted is asking for my National Insurance number, does this mean I have to pay taxes? I barely make money on

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