If you have a vehicle and have not been given the service schedule book then you may have no idea what if any services have been done on it. Most cars are usually kept up to date with the services for at least the first three years after which time some people can become a little complacent and miss one or two along the way. A service is important to ensure that the car is working as efficiently as possible and to try and prevent the unnecessary wear of parts.
If you have just bought a car but have no service history for it you can do some investigation work and try to find out yourself information on past services. If the car came with any receipts, then have a good look through them first and see if you can find an invoice for a service. If you know where the car has been taken for repairs you could ring that garage up and ask them if they have any service history for the vehicle. You can sometimes order a duplicate service book online for the make and model of your vehicle but be sure to then try and contact the servicing garages to ask if they would be willing to stamp it for you.