Don't panic! Here are the full rules:
If you’re providing identity documents other than an up-to-date passport, UK travel document or an EC/EEA identity card (apart from Sweden), you must get someone reliable to sign the back of your photo. The person signing your photo must also complete section seven of your D1 form.
DVLA will make random checks on people who sign photocard driving licence applications.
If you're renewing the photo on your driving licence you won’t need the photo certified.
The person signing your photo
The person must:
* live in the UK
* know you personally (for at least two years)
* not be a relative
Suitable people include:
* a local business person or shopkeeper
* a librarian
* a professionally qualified person, for example, a lawyer, teacher or engineer
* a police officer
* a bank or building society officer
* a civil servant
* a minister of religion
* a magistrate
* a local councillor, MP, AM, MEP or MSP
If you have come to live in the UK within the last two years and you cannot have your photo signed by someone who has known you for at least two years within the UK, you should take all the documents to your nearest DVLA local office. They will sign your photo and fill in section seven of the application form. The DVLA local office will send your application and original identity documents to DVLA Swansea.
So you only need the photo signed if you're not sending your passport, and if that's the case you can take it to the DVLA office with proof of ID and they'll sign it!