I read on a website I don’t have to sign the S172 form, is this correct?

The recipient of the request is responsible for the consequences of not completing the form properly; if you do not do this we will return the Notice without extending your time for completion.

If a properly completed form is not received by this office within the specified timescale you may be summonsed to the Magistrates’ Court for the offence of ‘Failing to Furnish’.