Digital wallets—whether consumer-facing, embedded, or enterprise treasury wallets—are among the most operationally complex financial instruments to reconcile. Wallet balances must reflect the net of deposits, withdrawals, fees, transfers, and reversals across multiple funding sources and settlement timelines. Any discrepancy between the wallet ledger and the underlying payment processor records creates financial exposure and erodes user trust. This tag covers wallet infrastructure patterns, reconciliation approaches for wallet operators, and the operational engineering behind accurate real-time wallet balances at scale—including how to close the gap between what your wallet system records and what actually settled with your banking and PSP partners.