This article explores Contacts that have no Account/Organisation. In this case the Contact should be associated to a generic Account/Organisation to help facilitate a better database sharing structure - common generic Account/Organisation Names include: No Organisation, Unspecified, Consumer, General Account.
Contacts that are not linked to an Account/Organisation are always private, regardless of your organisation’s sharing model. Only the owner of the contact and administrators will be able to view the record, which in most cases will cause issues with accessibility.
Account Name Field
The generic Account/Organisation can be assigned to the contact via the standard Account Name field on the contact record.
Come up with an internal strategy for managing contacts that have no recognised Account/Organisation using a generic Account/Organisation and make sure that all users are aware of this standard.
A typical generic account record will typically have no detail, but several related contacts.