Four things shared, one of them a joining signal

A household is the case that produces the most accidental signals and the fewest actual breaches. Two adults, one address, one router, sometimes one card - and among all of that overlap, exactly one input that a comparison treats as proof of anything. This page works through which is which and what disclosure looks like.

Open the partner account Start with what the clause says

Joins the two: one artefact, one person expectedKeeps them apart: a verified fact that differsA person decides: an overlap a household also produces

Direct answerA shared postal address, a shared home network and a shared surname are ambiguous signals that a household produces by living in one place, and on their own they do not link two accounts. A payment instrument in one person's name funding two accounts is different: it is a joining signal, and it also engages the separate requirement that a holder's deposits come from the holder's own funds. The route for the honest case is to declare the shared source and evidence it, not to substitute a different name.

Address: ambiguousNetwork: ambiguousSurname: ambiguousCard in one name: joining

The four overlaps, sorted

overlap 1

ambiguous The postal address. Registrations at any address in a block of flats share it, and so does a family. An address is compared because it is free to compare, not because it means anything on its own - which is why the operator's own review band exists.

overlap 2

ambiguous The home network. Every device behind one router presents the same public address, and a mobile network address is shared by thousands of strangers. The signal that a reader finds most alarming is the one that is least informative.

overlap 3

ambiguous The device. Shared laptops, tablets and phones are ordinary. A device identifier is more personal than a router address but still weaker than a card, because it proves the hardware rather than the person holding it.

overlap 4

joining A card in one name on two accounts. This is the mid-strength signal that decides cases, and it is joined by an independent obligation: deposits are supposed to come from the holder's own funds. Where the money truly is joint, the mechanism is to say so on the record.

The two-column view

What a household shares lawfully

An address, a surname, a router, a device, a television, a postcode, a doorbell. None of these breaks the clause, and most of them are impossible to avoid. The comparison is designed with this case in mind, which is why ambiguous signals are counted separately from joining ones.

What needs to be declared

A payment instrument that funds two accounts and belongs to one of the two people. This is not a breach by itself - a joint account or a household card is a real thing - but it is an overlap the operator will see and cannot interpret without the reader's explanation and evidence.

Worked example - a household of two, four overlaps (illustrative) Two adults, one address, one laptop, one debit card, 12 months of trading on two accounts at one operator (illustrative). Overlaps detected: address, network, device, card = 4. Ambiguous signals: address, network, device = 3. Joining signals: the card = 1. Under the rule used on the comparison page - a joining signal is decisive when the name and date of birth also match, and 0 joining signals is otherwise clear - this pair goes to review, not to an automatic linkage: one joining signal, and two different verified names on the two records. That is the arithmetic a household is exposed to. Four overlaps sounds alarming in a terms document and the count that decides reads one; the second verified adult is what keeps it out of the automatic outcome, which is the gap this page exists to close.

The two accounts the household cannot explain

Two cases in a household genuinely do produce a second account, and they are worth separating from the accidental overlap above because the remedy differs.

A partner who used the other person's account. This is third-party use rather than duplication. The person who played was not the holder, the holder's signals are on one record only, and the mechanism is the clause on personal use rather than the clause on singularity - the rule page covers both.
A genuine second account in the second person's own name. This is the ordinary case: two adults, two accounts, two names, one address. The overlap is ambiguous, the separating signal is a distinct verified identity, and the pair should clear or reach review rather than link.
A second account opened after a limit was refused. A new account at the same operator to escape a deposit limit, a loss limit or an exclusion is the case the clause exists for, and it fails on the signals that were already known - the limits desk covers the controls involved.

What disclosure looks like in practice

The honest version of a shared household is a short set of facts, given before it is asked for where possible and always in writing: who each account belongs to, which instrument is shared, whose money moves through it, and what evidence exists for the second person's own funds or own card. An operator cannot decide a review on a chat message it cannot attach to a file, and the appeal page sets out the shape of a submission that can be attached.

The line this page keeps. Nothing here is a technique for keeping a household's accounts separate from a comparison, and the desk does not describe one. The overlaps above are described so that a reader can recognise their own situation and explain it truthfully - which is the only route that preserves both the balance and the complaint route behind it.