diff --git a/lamassu-schema.json b/lamassu-schema.json
index 5ad0d845..4bda4d34 100644
--- a/lamassu-schema.json
+++ b/lamassu-schema.json
@@ -70,7 +70,8 @@
       "fields": [
         "ticker",
         "wallet",
-        "exchange"
+        "exchange",
+        "zeroConf"
       ]
     },
     {
@@ -176,7 +177,7 @@
       "displayBottom": "Limit",
       "fieldType": "integer",
       "fieldClass": "fiat",
-      "cryptoScope": "both",
+      "cryptoScope": "global",
       "machineScope": "both",
       "enabledIf": [
         "cashOutEnabled"
@@ -213,6 +214,14 @@
       "fieldValidation": [],
       "default": "no-exchange"
     },
+    {
+      "code": "zeroConf",
+      "displayBottom": "Zero Conf",
+      "fieldType": "account",
+      "fieldClass": "zeroConf",
+      "fieldValidation": [],
+      "default": "all-zero-conf"
+    },
     {
       "code": "fiatCurrency",
       "displayBottom": "Fiat Currency",
diff --git a/lib/admin/config.js b/lib/admin/config.js
index 2332d321..1fa27c65 100644
--- a/lib/admin/config.js
+++ b/lib/admin/config.js
@@ -153,7 +153,10 @@ function fetchData () {
       {code: 'mock-sms', display: 'Mock SMS', class: 'sms'},
       {code: 'mock-id-verify', display: 'Mock ID verifier', class: 'idVerifier'},
       {code: 'twilio', display: 'Twilio', class: 'sms'},
-      {code: 'mailjet', display: 'Mailjet', class: 'email'}
+      {code: 'mailjet', display: 'Mailjet', class: 'email'},
+      {code: 'all-zero-conf', display: 'All pass', class: 'zeroConf'},
+      {code: 'blockcypher', display: 'Blockcypher', class: 'zeroConf'},
+      {code: 'mock-zero-conf', display: 'Mock 0-conf', class: 'zeroConf'}
     ],
     machines: machineList.map(machine => ({machine: machine.deviceId, display: machine.name}))
   }))
diff --git a/lib/plugin-helper.js b/lib/plugin-helper.js
index d4ce91b8..d9c9b6f5 100644
--- a/lib/plugin-helper.js
+++ b/lib/plugin-helper.js
@@ -8,7 +8,8 @@ const pluginCodes = {
   EXCHANGE: 'exchange',
   WALLET: 'wallet',
   SMS: 'sms',
-  EMAIL: 'email'
+  EMAIL: 'email',
+  ZERO_CONF: 'zero-conf'
 }
 
 module.exports = _.assign({load, loadSchemas}, pluginCodes)
diff --git a/lib/plugins.js b/lib/plugins.js
index 40f6753d..06ec353f 100644
--- a/lib/plugins.js
+++ b/lib/plugins.js
@@ -231,7 +231,7 @@ function plugins (settings, deviceId) {
   }
 
   function getStatus (tx) {
-    return wallet.getStatus(settings, tx.toAddress, tx.cryptoAtoms, tx.cryptoCode)
+    return wallet.getStatus(settings, tx.toAddress, tx.cryptoAtoms, tx.cryptoCode, tx.fiat, deviceId)
   }
 
   function newAddress (tx) {
@@ -471,6 +471,8 @@ function plugins (settings, deviceId) {
     const config = configManager.machineScoped(_deviceId, settings.config)
     const cryptoCodes = config.cryptoCurrencies
     const fiatCode = config.fiatCurrency
+
+    console.log('DEBUG103: %j', cryptoCodes)
     const fiatBalancePromises = cryptoCodes.map(c => fiatBalance(fiatCode, c))
 
     return Promise.all(fiatBalancePromises)
diff --git a/lib/plugins/zero-conf/blockcypher/blockcypher.js b/lib/plugins/zero-conf/blockcypher/blockcypher.js
new file mode 100644
index 00000000..21e71f52
--- /dev/null
+++ b/lib/plugins/zero-conf/blockcypher/blockcypher.js
@@ -0,0 +1,28 @@
+const qs = require('querystring')
+const axios = require('axios')
+const _ = require('lodash/fp')
+
+module.exports = {authorize}
+
+function authorize (account, toAddress, cryptoAtoms, cryptoCode) {
+  return Promise.resolve()
+  .then(() => {
+    if (cryptoCode !== 'BTC') throw new Error('Unsupported crypto: ' + cryptoCode)
+
+    const query = qs.stringify({
+      token: account.token,
+      includeConfidence: true,
+      confidence: account.confidence
+    })
+
+    const url = `https://api.blockcypher.com/v1/btc/main/addrs/${toAddress}?${query}`
+
+    return axios.get(url)
+    .then(r => {
+      const data = r.data
+      const authorizedValue = _.sumBy('value', data.txrefs)
+
+      return cryptoAtoms.lte(authorizedValue)
+    })
+  })
+}
diff --git a/lib/plugins/zero-conf/mock-zero-conf/mock-zero-conf.js b/lib/plugins/zero-conf/mock-zero-conf/mock-zero-conf.js
new file mode 100644
index 00000000..4427162c
--- /dev/null
+++ b/lib/plugins/zero-conf/mock-zero-conf/mock-zero-conf.js
@@ -0,0 +1,11 @@
+module.exports = {authorize}
+
+function authorize (account, toAddress, cryptoAtoms, cryptoCode) {
+  return Promise.resolve()
+  .then(() => {
+    if (cryptoCode !== 'BTC') throw new Error('Unsupported crypto: ' + cryptoCode)
+
+    const authorizedValue = 1e5 * 10
+    return cryptoAtoms.lte(authorizedValue)
+  })
+}
diff --git a/lib/wallet.js b/lib/wallet.js
index 6d0f73ae..08cb2faf 100644
--- a/lib/wallet.js
+++ b/lib/wallet.js
@@ -26,6 +26,7 @@ function computeSeed (masterSeed) {
 }
 
 function fetchWallet (settings, cryptoCode) {
+  console.log('DEBUG102')
   return fs.readFile(options.seedPath, 'utf8')
   .then(hex => {
     const masterSeed = Buffer.from(hex.trim(), 'hex')
@@ -66,11 +67,39 @@ function newAddress (settings, info) {
   .then(r => r.wallet.newAddress(r.account, info))
 }
 
-function getStatus (settings, toAddress, cryptoAtoms, cryptoCode) {
+function getWalletStatus (settings, toAddress, cryptoAtoms, cryptoCode) {
   return fetchWallet(settings, cryptoCode)
   .then(r => r.wallet.getStatus(r.account, toAddress, cryptoAtoms, cryptoCode))
 }
 
+function authorizeZeroConf (settings, toAddress, cryptoAtoms, cryptoCode, fiat, machineId) {
+  const cryptoConfig = configManager.cryptoScoped(cryptoCode, settings.config)
+  const machineConfig = configManager.machineScoped(machineId, settings.config)
+  const plugin = cryptoConfig.zeroConf
+  const zeroConfLimit = machineConfig.zeroConfLimit
+
+  if (fiat.gt(zeroConfLimit)) return Promise.resolve(false)
+  if (cryptoCode !== 'BTC' || plugin === 'all-zero-conf') return Promise.resolve(true)
+
+  const zeroConf = ph.load(ph.ZERO_CONF, plugin)
+  const account = settings.accounts[plugin]
+
+  return zeroConf.authorize(account, toAddress, cryptoAtoms, cryptoCode)
+}
+
+function getStatus (settings, toAddress, cryptoAtoms, cryptoCode, fiat, machineId) {
+  const promises = [
+    getWalletStatus(settings, toAddress, cryptoAtoms, cryptoCode),
+    authorizeZeroConf(settings, toAddress, cryptoAtoms, cryptoCode, fiat, machineId)
+  ]
+
+  return Promise.all(promises)
+  .then(([status, isAuthorized]) => {
+    if (status === 'authorized') return isAuthorized ? 'authorized' : 'published'
+    return status
+  })
+}
+
 function sweep (settings, cryptoCode, hdIndex) {
   return fetchWallet(settings, cryptoCode)
   .then(r => r.wallet.sweep(r.account, cryptoCode, hdIndex))
diff --git a/migrations/034-add_cash_out_error_code.js b/migrations/034-add_cash_out_error_code.js
index 939238c6..b8a446b0 100644
--- a/migrations/034-add_cash_out_error_code.js
+++ b/migrations/034-add_cash_out_error_code.js
@@ -1,8 +1,12 @@
+var db = require('./db')
 
-exports.up = function(next){
-  next();
-};
+exports.up = function (next) {
+  var sql = [
+    'alter table cash_out_txs add column error_code text'
+  ]
+  db.multi(sql, next)
+}
 
-exports.down = function(next){
-  next();
-};
+exports.down = function (next) {
+  next()
+}
diff --git a/public/elm.js b/public/elm.js
index e0108007..7556a1f1 100644
--- a/public/elm.js
+++ b/public/elm.js
@@ -34010,19 +34010,28 @@ var _user$project$NavBar$view = F2(
 												ctor: '::',
 												_0: {
 													ctor: '_Tuple3',
-													_0: 'Twilio',
-													_1: _user$project$CoreTypes$AccountRoute('twilio'),
+													_0: 'Blockcypher',
+													_1: _user$project$CoreTypes$AccountRoute('blockcypher'),
 													_2: true
 												},
 												_1: {
 													ctor: '::',
 													_0: {
 														ctor: '_Tuple3',
-														_0: 'Mailjet',
-														_1: _user$project$CoreTypes$AccountRoute('mailjet'),
+														_0: 'Twilio',
+														_1: _user$project$CoreTypes$AccountRoute('twilio'),
 														_2: true
 													},
-													_1: {ctor: '[]'}
+													_1: {
+														ctor: '::',
+														_0: {
+															ctor: '_Tuple3',
+															_0: 'Mailjet',
+															_1: _user$project$CoreTypes$AccountRoute('mailjet'),
+															_2: true
+														},
+														_1: {ctor: '[]'}
+													}
 												}
 											}
 										}
diff --git a/schemas/blockcypher.json b/schemas/blockcypher.json
new file mode 100644
index 00000000..e56becd4
--- /dev/null
+++ b/schemas/blockcypher.json
@@ -0,0 +1,20 @@
+{
+  "code": "blockcypher",
+  "display": "Blockcypher",
+  "fields": [
+    {
+      "code": "token",
+      "display": "API token",
+      "fieldType": "password",
+      "required": true,
+      "value": ""
+    },
+    {
+      "code": "confidenceFactor",
+      "display": "Confidence Factor",
+      "fieldType": "string",
+      "required": true,
+      "value": ""
+    }
+  ]
+}