I want to create a charity page which will give the donator something in return. The donator will pay an amount (currently undecided) and this will link them to a page. On this page, they can enter their personal details (Name, Address, Emergency contacts...). In return they are sent a tag/ necklace. The tag will have a bar code on it, a username and a password. I'd like the bar code to link to a system that stores the person's personal information, but a username and password is required to view it.
If the person with the tag were to have an accident and unable to help themselves, someone could scan the tag. This will link them to the page. They log in with the username and password written on the tag and they can access the injured person's contacts.
This is a rough guide line for the website that will expanded in future.