APF stands for Advanced Processing Facility.Every project of a developer is expected to have a valid APF number or a code. The APF Number is provided by banks or housing finance companies (HFCs). The APF Number denotes that the project has received all necessary approvals, and that homebuyers can invest in the project without any fear about the credibility of the developer.Most developers have tie-ups with banks or Housing Finance Corporations (HFCs) who offer home loans to the customers. The APF number makes it convenient for home loan buyers to get home loans and saves them from the horror of collecting legal documents of the project from the developer.