diff --git a/Cargo.lock b/Cargo.lock
index 37616ff3d..7432609e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1260,8 +1260,6 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 [[package]]
 name = "orchard"
 version = "0.1.0-beta.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b48e6e124c3f7e9ed7f48b29f66069288235cecd16aa6053e98f8aff16efe827"
 dependencies = [
  "aes",
  "arrayvec 0.7.2",
diff --git a/Cargo.toml b/Cargo.toml
index afe54f261..8fd81ffaf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -87,6 +87,7 @@ codegen-units = 1
 
 [patch.crates-io]
 hdwallet = { git = "https://github.com/nuttycom/hdwallet", rev = "576683b9f2865f1118c309017ff36e01f84420c9" }
+orchard = { path = "../orchard/" }
 zcash_address = { git = "https://github.com/zcash/librustzcash.git", rev = "9c1ed86c5aa8ae3b6d6dcc1478f2d6ba1264488f" }
 zcash_encoding = { git = "https://github.com/zcash/librustzcash.git", rev = "9c1ed86c5aa8ae3b6d6dcc1478f2d6ba1264488f" }
 zcash_history = { git = "https://github.com/zcash/librustzcash.git", rev = "9c1ed86c5aa8ae3b6d6dcc1478f2d6ba1264488f" }
diff --git a/src/rust/include/rust/builder.h b/src/rust/include/rust/builder.h
index a95e5ddfb..f0d0212a8 100644
--- a/src/rust/include/rust/builder.h
+++ b/src/rust/include/rust/builder.h
@@ -42,6 +42,10 @@ OrchardBuilderPtr* orchard_builder_new(
 /// Frees an Orchard builder returned from `orchard_builder_new`.
 void orchard_builder_free(OrchardBuilderPtr* ptr);
 
+bool orchard_builder_duplicate_nullifier_spend(
+    OrchardBuilderPtr* ptr
+);
+
 /// Adds a note to be spent in this bundle.
 ///
 /// Returns `false` if the Merkle path in `spend_info` does not have the
diff --git a/src/rust/src/builder_ffi.rs b/src/rust/src/builder_ffi.rs
index 5e3c4ab12..d4fd7f4a3 100644
--- a/src/rust/src/builder_ffi.rs
+++ b/src/rust/src/builder_ffi.rs
@@ -66,6 +66,17 @@ pub extern "C" fn orchard_builder_new(
     )))
 }
 
+#[no_mangle]
+pub extern "C" fn orchard_builder_duplicate_nullifier_spend(
+    builder: *mut Builder
+) -> bool {
+    let builder = unsafe { builder.as_mut() }.expect("Builder may not be null.");
+
+    builder.add_duplicate_nullifier_spend(OsRng);
+
+    true
+}
+
 #[no_mangle]
 pub extern "C" fn orchard_builder_add_spend(
     builder: *mut Builder,
diff --git a/src/transaction_builder.cpp b/src/transaction_builder.cpp
index 2d434b9ea..fea0ddc4b 100644
--- a/src/transaction_builder.cpp
+++ b/src/transaction_builder.cpp
@@ -42,6 +42,16 @@ Builder::Builder(
     inner.reset(orchard_builder_new(spendsEnabled, outputsEnabled, anchor.IsNull() ? nullptr : anchor.begin()));
 }
 
+void Builder::AddBogusSpends()
+{
+    if (!inner) {
+        throw std::logic_error("orchard::Builder has already been used");
+    }
+
+    orchard_builder_duplicate_nullifier_spend(inner.get());
+    hasActions = true;
+}
+
 bool Builder::AddSpend(orchard::SpendInfo spendInfo)
 {
     if (!inner) {
@@ -292,6 +302,15 @@ bool TransactionBuilder::SupportsOrchard() const {
     return orchardBuilder.has_value();
 }
 
+void TransactionBuilder::AddBogusOrchardSpends()
+{
+    if (!orchardBuilder.has_value()) {
+        throw std::runtime_error("TransactionBuilder orchardBuilder not setup");
+    }
+
+    orchardBuilder.value().AddBogusSpends();
+}
+
 bool TransactionBuilder::AddOrchardSpend(
     libzcash::OrchardSpendingKey sk,
     orchard::SpendInfo spendInfo)
diff --git a/src/transaction_builder.h b/src/transaction_builder.h
index 4df41ba55..cbfa4cc2a 100644
--- a/src/transaction_builder.h
+++ b/src/transaction_builder.h
@@ -101,6 +101,8 @@ public:
         return *this;
     }
 
+    void AddBogusSpends();
+
     /// Adds a note to be spent in this bundle.
     ///
     /// Returns `false` if the given Merkle path does not have the required anchor
@@ -337,6 +339,8 @@ public:
 
     bool SupportsOrchard() const;
 
+    void AddBogusOrchardSpends();
+
     bool AddOrchardSpend(
         libzcash::OrchardSpendingKey sk,
         orchard::SpendInfo spendInfo);