4. What personal data do people need to give if they want to sign an initiative ?
That depends on the country which is responsible for verifying the validity of your statement of support. Most Member States will require the following details: name, permanent address, date and place of birth, nationality and signature with a date.
Most Member States will also require you to give an ID card number. There are nine countries that do not require this: Belgium, Denmark, Estonia, Finland, Germany, Ireland, Netherlands, Slovakia, and the United Kingdom.