diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip60Cashu/CashuWalletState.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip60Cashu/CashuWalletState.kt
index ff9d4a8bd5..938dccf661 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip60Cashu/CashuWalletState.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip60Cashu/CashuWalletState.kt
@@ -237,6 +237,22 @@ class CashuWalletState(
         }.flowOn(Dispatchers.Default)
             .stateIn(scope, SharingStarted.Eagerly, emptyList())
 
+    /**
+     * Mints we hold a spendable balance at but never configured in our
+     * kind:17375 wallet — keyed by mint URL → balance in sats. Almost
+     * always coins auto-redeemed from a NIP-61 nutzap that was sent on a
+     * mint outside our kind:10019. Surfaced so the wallet can highlight
+     * them and nudge the user to move the funds to a mint they trust (or
+     * out to Lightning): holding ecash at an unvetted mint means trusting
+     * an issuer the user never chose. Empty in the common case where every
+     * mint we hold is also configured.
+     */
+    val unconfiguredMintBalances: StateFlow<Map<String, Long>> =
+        combine(_mints, mintBalances) { configured, balances ->
+            balances.filterKeys { it !in configured }.filterValues { it > 0 }
+        }.flowOn(Dispatchers.Default)
+            .stateIn(scope, SharingStarted.Eagerly, emptyMap())
+
     private val _history = MutableStateFlow<List<CashuSpendingHistoryEvent>>(emptyList())
     val history: StateFlow<List<CashuSpendingHistoryEvent>> = _history.asStateFlow()
 
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletScreen.kt
index f23214591d..c1d5f0d9d5 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletScreen.kt
@@ -118,6 +118,10 @@ fun CashuWalletScreen(
     // per-mint rows below sum to the full balance.
     val mints by viewModel.mints.collectAsState()
     val displayMints by viewModel.displayMints.collectAsState()
+    // Mints we hold a balance at but never configured (typically coins from a
+    // nutzap auto-redeemed on a mint outside our kind:10019). Highlighted so
+    // the user can move them somewhere they trust.
+    val unconfiguredMintBalances by viewModel.unconfiguredMintBalances.collectAsState()
     val balanceSats by viewModel.balanceSats.collectAsState()
     val mintBalances by viewModel.mintBalances.collectAsState()
     val history by viewModel.history.collectAsState()
@@ -173,6 +177,7 @@ fun CashuWalletScreen(
                     balanceSats = balanceSats,
                     mints = displayMints,
                     mintBalances = mintBalances,
+                    unconfiguredMints = unconfiguredMintBalances.keys,
                     history = history,
                     pendingQuoteCount = pendingQuotes.size,
                     accountViewModel = accountViewModel,
@@ -311,6 +316,7 @@ private fun CashuWalletContent(
     balanceSats: Long,
     mints: List<String>,
     mintBalances: Map<String, Long>,
+    unconfiguredMints: Set<String>,
     history: List<CashuSpendingHistoryEvent>,
     pendingQuoteCount: Int,
     accountViewModel: AccountViewModel,
@@ -338,6 +344,10 @@ private fun CashuWalletContent(
             item { PendingQuoteBanner(count = pendingQuoteCount, onResume = onResumePendingQuote) }
         }
 
+        if (unconfiguredMints.isNotEmpty()) {
+            item { UntrustedMintBanner(count = unconfiguredMints.size) }
+        }
+
         item {
             ActionRow(
                 onReceive = onReceive,
@@ -356,7 +366,12 @@ private fun CashuWalletContent(
             )
         }
         items(mints, key = { it }) { mint ->
-            MintRow(mint = mint, balanceSats = mintBalances[mint] ?: 0L, onTopUp = { onTopUpMint(mint) })
+            MintRow(
+                mint = mint,
+                balanceSats = mintBalances[mint] ?: 0L,
+                untrusted = mint in unconfiguredMints,
+                onTopUp = { onTopUpMint(mint) },
+            )
         }
 
         if (history.isNotEmpty()) {
@@ -437,6 +452,53 @@ private fun PendingQuoteBanner(
     }
 }
 
+/**
+ * Surfaced above the mint list when we hold a balance at one or more mints
+ * the user never configured — almost always coins auto-redeemed from a
+ * NIP-61 nutzap sent on a mint outside our kind:10019. Informational for
+ * now (it explains the situation and recommends moving the funds); the
+ * per-mint "move coins off this mint" action lands in a follow-up.
+ */
+@Composable
+private fun UntrustedMintBanner(count: Int) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        shape = RoundedCornerShape(12.dp),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.errorContainer),
+    ) {
+        Row(
+            modifier = Modifier.padding(horizontal = 14.dp, vertical = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Icon(
+                symbol = MaterialSymbols.Warning,
+                contentDescription = null,
+                modifier = Modifier.size(20.dp),
+                tint = MaterialTheme.colorScheme.onErrorContainer,
+            )
+            Spacer(modifier = Modifier.width(10.dp))
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text =
+                        pluralStringResource(
+                            R.plurals.cashu_untrusted_mint_title,
+                            count,
+                            count,
+                        ),
+                    style = MaterialTheme.typography.bodyMedium,
+                    fontWeight = FontWeight.SemiBold,
+                    color = MaterialTheme.colorScheme.onErrorContainer,
+                )
+                Text(
+                    text = stringRes(R.string.cashu_untrusted_mint_subtitle),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onErrorContainer.copy(alpha = 0.8f),
+                )
+            }
+        }
+    }
+}
+
 @Composable
 private fun BalanceCard(balanceSats: Long) {
     val formatted =
@@ -543,6 +605,7 @@ private fun ActionTile(
 private fun MintRow(
     mint: String,
     balanceSats: Long,
+    untrusted: Boolean,
     onTopUp: () -> Unit,
 ) {
     val formattedBalance =
@@ -551,7 +614,15 @@ private fun MintRow(
         }
     Card(
         modifier = Modifier.fillMaxWidth(),
-        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant),
+        colors =
+            CardDefaults.cardColors(
+                containerColor =
+                    if (untrusted) {
+                        MaterialTheme.colorScheme.errorContainer
+                    } else {
+                        MaterialTheme.colorScheme.surfaceVariant
+                    },
+            ),
     ) {
         Row(
             modifier = Modifier.padding(start = 12.dp, end = 4.dp, top = 6.dp, bottom = 6.dp),
@@ -563,7 +634,16 @@ private fun MintRow(
                 modifier = Modifier.size(20.dp),
             )
             Spacer(modifier = Modifier.width(12.dp))
-            Text(text = mint, style = MaterialTheme.typography.bodyMedium, modifier = Modifier.weight(1f))
+            Column(modifier = Modifier.weight(1f)) {
+                Text(text = mint, style = MaterialTheme.typography.bodyMedium)
+                if (untrusted) {
+                    Text(
+                        text = stringRes(R.string.cashu_untrusted_mint_badge),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+            }
             Spacer(modifier = Modifier.width(8.dp))
             Text(
                 text = "$formattedBalance ${stringRes(R.string.wallet_sats)}",
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletViewModel.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletViewModel.kt
index 3ae037082f..4b682f1ac6 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletViewModel.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletViewModel.kt
@@ -155,6 +155,7 @@ class CashuWalletViewModel : ViewModel() {
     val walletEvent get() = state.walletEvent
     val mints get() = state.mints
     val displayMints get() = state.displayMints
+    val unconfiguredMintBalances get() = state.unconfiguredMintBalances
     val balanceSats get() = state.balanceSats
     val mintBalances get() = state.mintBalances
     val tokenEntries: StateFlow<List<TokenEntry>> get() = state.tokenEntries
diff --git a/amethyst/src/main/res/values/strings.xml b/amethyst/src/main/res/values/strings.xml
index baaea037b7..142238422c 100644
--- a/amethyst/src/main/res/values/strings.xml
+++ b/amethyst/src/main/res/values/strings.xml
@@ -3294,6 +3294,13 @@
     <string name="cashu_pending_quotes_subtitle">Tap to resume and check status.</string>
     <string name="cashu_pending_quotes_resume">Resume</string>
 
+    <plurals name="cashu_untrusted_mint_title">
+        <item quantity="one">Funds held at %1$d mint you don\'t use</item>
+        <item quantity="other">Funds held at %1$d mints you don\'t use</item>
+    </plurals>
+    <string name="cashu_untrusted_mint_subtitle">These coins arrived from a nutzap. Move them to a mint you trust or withdraw to Lightning to keep them safe.</string>
+    <string name="cashu_untrusted_mint_badge">Not in your wallet</string>
+
     <string name="event_sync_less_than_until">&lt;%1$s</string>
     <string name="event_sync_status_connecting">Connecting</string>
     <string name="event_sync_status_downloading">Downloading</string>