An Approval in Principle (AIP) is the first step in the mortgage process for most people. You should apply for an AIP as soon as you've made the decision to build or buy a home. There is no cost in applying for an AIP and once approved, it is valid for 12 months. An AIP from EBS is fully underwritten/assessed and gives you a strong indication as to the level of mortgage finance you qualify for (subject to conditions), should you find a suitable property. To apply for an approval in principle, you'll need to complete an application form and return it with some income documents and your bank statements.