diff --git a/README.md b/README.md
index a7f1720b5667610dfd4f95c99e01771c194eb8d6..472fc1215db534ba4f3e6530f270a8d95a301dc8 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,6 @@ transactions = [Transaction.from_dict({
 })]
 
 vouchers = [Voucher.from_dict({
-    "batchid": 1,
     "exref": 3,
     "voucherno": 4,
     "transactions": transactions
@@ -44,7 +43,6 @@ batch = Batch.from_dict({
     "period": 3,
     "interface": 4,
     "vouchertype": 5,
-    "batchid_interface": 6,
     "vouchers": vouchers
 })
 
diff --git a/tests/fixtures/batch_fail_fixture.json b/tests/fixtures/batch_fail_fixture.json
index fa7d12a4e35209bbe47eb042bbd1819d9b57e4ca..6ddadead36ead5ed6b624087ce0d786e488a4b02 100644
--- a/tests/fixtures/batch_fail_fixture.json
+++ b/tests/fixtures/batch_fail_fixture.json
@@ -4,8 +4,7 @@
     "batchid": 54,
     "period": 1,
     "interface": 1,
-    "vouchertype": 1,
-    "batchid_interface": 1
+    "vouchertype": 1
   },
   "vouchers": [
     {
diff --git a/tests/fixtures/batch_fixture.json b/tests/fixtures/batch_fixture.json
index 298ce71c1cc2535ea37c3856adc0f078f52e762f..fbbb4ec7c0e0576d0f7c87006f671b7d9e86b294 100644
--- a/tests/fixtures/batch_fixture.json
+++ b/tests/fixtures/batch_fixture.json
@@ -4,6 +4,5 @@
   "period": 3,
   "interface": 4,
   "vouchertype": 5,
-  "batchid_interface": 6,
   "vouchers": []
 }
diff --git a/tests/fixtures/batch_with_voucher_fixture.json b/tests/fixtures/batch_with_voucher_fixture.json
index a58a3d1cf40d99a72a19dc3782162690e8e688b9..97b0b95de665340ae5e9a8d600b3095aa69fcad8 100644
--- a/tests/fixtures/batch_with_voucher_fixture.json
+++ b/tests/fixtures/batch_with_voucher_fixture.json
@@ -4,7 +4,6 @@
   "period": 1,
   "interface": 1,
   "vouchertype": 1,
-  "batchid_interface": 1,
   "vouchers": [
     {
       "exref": 1,
diff --git a/tests/fixtures/voucher_fixture.json b/tests/fixtures/voucher_fixture.json
index dc62f8695670b47db5fdfcb2d6374b75ae1515db..679a9cc989930b146bd721b4e2299f47c0928564 100644
--- a/tests/fixtures/voucher_fixture.json
+++ b/tests/fixtures/voucher_fixture.json
@@ -1,5 +1,4 @@
 {
-  "batchid": 1,
   "exref": 3,
   "voucherno": 4,
   "transactions": [