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The limits of a single-address field

From Anières

Subjects rarely live in one place. The one-address field encourages everyone to pretend they do.

The single-address field on almost every form is a fiction the paperwork inherits from an earlier century. People at the level this work sits at rarely have one address, and the one they choose to declare is almost always the least interesting of the set. The interesting question is which addresses they do not declare, held under which vehicle, receiving which post, and used how often.

We build addresses as a graph: every address the person has been associated with, with the source of the association, the date range, the role (residence, registered office, correspondence, mail-forwarding service, family member's home, business premises). The graph rarely resolves to one node. It usually resolves to a small cluster of nodes with overlapping date ranges.

The cluster tells you something the single address cannot. A person whose residences shift between three cities over six years, with roles filed against each in rotation, is operating a portable residency. A person whose addresses are all mail-forwarding services is not findable at any of them. A person whose registered office addresses cluster around two firms is using corporate service providers, and the providers are the connecting fact, not the addresses.

Addresses also resolve identities; two people who share a residential address are usually related or living together. Two people who share a registered office and a corporate service provider are co-clients of a firm, not necessarily connected. Two people who share a residential address and a series of roles together are something more specific.

We surface the graph in reports when it matters and suppress it when it does not. Address history is sensitive; we do not include it because we can. We include it when the analysis depends on it and we say plainly why.

Written alongside work at Anières: exposure mapping, cross-reference, and standing-report systems for private clients.