Could one wallet use several cards or bank accounts?¶

Yes. One payment wallet can be funded by several cards, bank accounts, balances or other payment methods.

Avoid the dangerous assumption¶

The dangerous assumption is that every wallet transaction came from the same source or account holder.

A user may add personal and business cards, joint accounts, replacement cards or payment methods belonging to family members or associates.

The wallet may select a default source, use stored balance first or allow the user to choose at checkout.

Each funding source may generate separate bank, card and provider records that must be reconciled individually.

Preserve the wallet transaction, funding-source identifier, masked card or account details, amount, timestamp and transaction reference.

Ask the provider which source funded each payment and when each source was linked, verified, changed or removed.

Compare those records with issuer or bank data.

Do not assume that all linked sources were authorised or controlled by the registered wallet holder.

An offender may add a stolen card or compromised account.

Equally, several legitimate sources may be used routinely within a household or business.

A refund may return to the original funding source rather than the wallet balance. Failed or reversed attempts may also appear against only one linked source.

When tracing money, map the wallet transaction and the external funding transaction separately.

When reporting, distinguish wallet activity from the underlying bank or card movement.

Operational takeaway¶

Identify the specific funding source behind each wallet transaction and investigate who controlled both the wallet and that source rather than treating the account as a single pool.