diff --git a/arcus/exc.py b/arcus/exc.py
index 7750f53..5019c06 100644
--- a/arcus/exc.py
+++ b/arcus/exc.py
@@ -248,7 +248,7 @@ def __init__(self, **kwargs):
     R16=FailedConsult,
     R17=InvalidAmount,
     R18=LimitExceeded,
-    R19=InvalidBiller,
+    R19=UnprocessableEntity,
     R20=InvalidBiller,
     R21=InvalidBiller,
     R22=BillerMaintenance,
diff --git a/arcus/version.py b/arcus/version.py
index 240371d..61a7ce1 100644
--- a/arcus/version.py
+++ b/arcus/version.py
@@ -1 +1 @@
-__version__ = '1.2.8'  # pragma: no cover
+__version__ = '1.2.9'  # pragma: no cover
diff --git a/tests/resources/cassettes/test_bill_payment_type_error.yaml b/tests/resources/cassettes/test_bill_payment_type_error.yaml
new file mode 100644
index 0000000..84d112b
--- /dev/null
+++ b/tests/resources/cassettes/test_bill_payment_type_error.yaml
@@ -0,0 +1,29 @@
+interactions:
+- request:
+    body: '{"biller_id": 13599, "account_number": "559999", "amount": 100.0, "currency":
+      "MXN", "name_on_account": null}'
+    headers:
+      Accept: [application/vnd.regalii.v1.6+json]
+      Accept-Encoding: ['gzip, deflate']
+      Authorization: ['APIAuth 88879c1b066dc9aea6201f27be2bbba9:5ZV1v+AlHt7SGRwJ+RFD0tYRQr8=']
+      Connection: [keep-alive]
+      Content-Length: ['109']
+      Content-MD5: [U86ULvlq1wG/DVe1HygOkw==]
+      Content-Type: [application/json]
+      Date: ['Wed, 25 Sep 2019 23:47:50 GMT']
+      User-Agent: [python-requests/2.21.0]
+    method: POST
+    uri: https://api.casiregalii.com/bill/pay
+  response:
+    body: {string: '{"code":"R19","message":"Payments with this biller are currently unavailable","mode":"STAGING"}'}
+    headers:
+      Cache-Control: [no-cache]
+      Connection: [keep-alive]
+      Content-Type: [application/json; charset=utf-8]
+      Date: ['Wed, 25 Sep 2019 23:47:51 GMT']
+      Strict-Transport-Security: [max-age=31536000; includeSubDomains]
+      Transfer-Encoding: [chunked]
+      X-Request-Id: [7291a4fe-e4da-4133-9098-81dfb73df0e0]
+      X-Runtime: ['0.043308']
+    status: {code: 422, message: Unprocessable Entity}
+version: 1
diff --git a/tests/resources/test_bill_payments.py b/tests/resources/test_bill_payments.py
index 73e8795..9b998ef 100644
--- a/tests/resources/test_bill_payments.py
+++ b/tests/resources/test_bill_payments.py
@@ -1,6 +1,6 @@
 import pytest
 
-from arcus.exc import InvalidAccountNumber
+from arcus.exc import InvalidAccountNumber, UnprocessableEntity
 from arcus.resources import BillPayment
 
 
@@ -40,6 +40,18 @@ def test_bill_payment_invalid_phone_number(client):
     assert exc.biller_id == biller_id
 
 
+@pytest.mark.vcr
+def test_bill_payment_type_error(client):
+    biller_id = 13599
+    account_number = '559999'
+    amount = 100.0
+    with pytest.raises(UnprocessableEntity) as excinfo:
+        client.bill_payments.create(biller_id, account_number, amount)
+    exc = excinfo.value
+    assert exc.account_number == account_number
+    assert exc.biller_id == biller_id
+
+
 def test_bill_payment_list(client):
     with pytest.raises(NotImplementedError):
         client.bill_payments.list()