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Report a personal data breach - online form

This form is for organisations that have experienced a data breach. If you're an individual wanting to report a breach of your personal information, please use our complaints tool.

Do not include any of the personal data involved in the breach in the form, such as the names of data subjects affected. 

The information you provide must be accurate. You should give us as much detail as possible in this form. However, you can submit additional information afterwards by email.

Once you begin completing the form you will be unable to save it. Once you've completed the report, you will be able to review your answers. We'll then send you an email with a copy of your responses.

If you are have any problems with or comments about this tool, please complete our website feedback form.

Rhan un o chwech

Ynglŷn â'ch adroddiad

Pam rydych chi'n rhoi gwybod am y tor i'r ICO? (dewisol)

Os hoffech adael inni wybod am ddigwyddiad nad yw'n cyrraedd y trothwy ar gyfer rhoi gwybod, y ffordd gyflymaf o wneud hyn yw ffonio’n llinell gymorth ar 0303 123 1113. Efallai na fydd angen ichi ddarparu'r holl wybodaeth y gofynnir amdani yn y ffurflen yma.

Os nad ydych yn siŵr a yw'r digwyddiad yn cyrraedd y trothwy ar gyfer rhoi gwybod, ffoniwch ein llinell gymorth ar 0303 123 1113. Gallai arbed amser ichi, gan ei bod yn bosibl na fydd angen ichi roi gwybod am y tor. Gallwn ni hefyd roi cyngor am gamau i'w cymryd yn dilyn y tor.