diff --git a/src/main/java/io/zold/api/Wallet.java b/src/main/java/io/zold/api/Wallet.java
index 7347939..dfbc3f9 100644
--- a/src/main/java/io/zold/api/Wallet.java
+++ b/src/main/java/io/zold/api/Wallet.java
@@ -49,7 +49,8 @@
  *  Beware that tests should be refactored to take care of file cleanup
  *  after each case that merges wallets.
  */
-@SuppressWarnings({"PMD.ShortMethodName", "PMD.TooManyMethods"})
+@SuppressWarnings({"PMD.ShortMethodName", "PMD.TooManyMethods",
+    "PMD.UnusedFormalParameter"})
 public interface Wallet {
     /**
      * This wallet's ID: an unsigned 64-bit integer.
@@ -92,6 +93,13 @@ public interface Wallet {
     /**
      * A Fake {@link Wallet}.
      * @since 1.0
+     * @todo #65:30min Complete Wallet implementations with id, public RSA
+     *  key and network id. Wallets.create(Long, String, String) must
+     *  create a Wallet with these strings set and a constructor must be
+     *  added to all Walletl realizations (Wallet(final long id, final String
+     *  pubkey, final String network, final Transaction... transactions). After
+     *  completing these implementations fix tests that uses Wallets.create()
+     *  and all Wallet realizations.
      */
     final class Fake implements Wallet {
 
@@ -106,7 +114,7 @@ final class Fake implements Wallet {
         private final Iterable<Transaction> transactions;
 
         /**
-         * Ctor.
+         * Constructor.
          * @param id The wallet id.
          */
         public Fake(final long id) {
@@ -122,6 +130,17 @@ public Fake(final long id, final Transaction... transactions) {
             this(id, new IterableOf<>(transactions));
         }
 
+        /**
+         * Constructor.
+         * @param id The wallet id.
+         * @param pubkey The public RSA key of the wallet owner.
+         * @param network The network the walet belongs to.
+         * @checkstyle UnusedFormalParameter (2 lines)
+         */
+        public Fake(final long id, final String pubkey, final String network) {
+            this(id);
+        }
+
         /**
          * Ctor.
          * @param id The wallet id.
diff --git a/src/main/java/io/zold/api/Wallets.java b/src/main/java/io/zold/api/Wallets.java
index 1ffd451..cf89433 100644
--- a/src/main/java/io/zold/api/Wallets.java
+++ b/src/main/java/io/zold/api/Wallets.java
@@ -38,4 +38,16 @@ public interface Wallets extends Iterable<Wallet> {
      * @throws IOException If an error occurs.
      */
     Wallet create() throws IOException;
+
+    /**
+     * Create a wallet.
+     *
+     * @param id The wallet id.
+     * @param pubkey The wallet public key.
+     * @param network The network the wallet belongs.
+     * @return The new wallet.
+     * @throws IOException If an error occurs.
+     */
+    Wallet create(final long id, final String pubkey, final String
+        network) throws IOException;
 }
diff --git a/src/main/java/io/zold/api/WalletsIn.java b/src/main/java/io/zold/api/WalletsIn.java
index 4ce5351..8d8bf75 100644
--- a/src/main/java/io/zold/api/WalletsIn.java
+++ b/src/main/java/io/zold/api/WalletsIn.java
@@ -113,9 +113,6 @@ public WalletsIn(final Scalar<Path> pth, final String ext,
         this.random = random;
     }
 
-    // @todo #12:30min Create the new wallet in the path with all wallets.
-    //  It should contain the correct content according to the
-    //  white paper. Also add a the test to validate everything is ok.
     @Override
     public Wallet create() throws IOException {
         final Path wpth = this.path.value().resolve(
@@ -139,6 +136,18 @@ public Wallet create() throws IOException {
         return new Wallet.File(wpth);
     }
 
+    @Override
+    // @todo #65:30min Create the new wallet in the path with all wallets.
+    //  It should contain the correct content according to the
+    //  white paper (network, protocol version, id and public RSA key). After
+    //  this remove exception expect for tests on WalletsInTest.
+    public Wallet create(final long id, final String pubkey, final String
+        network) throws IOException {
+        throw new UnsupportedOperationException(
+            "WalletsIn.create(String, String, String) not supported"
+        );
+    }
+
     @Override
     public Iterator<Wallet> iterator() {
         try {
diff --git a/src/test/java/io/zold/api/WalletsInTest.java b/src/test/java/io/zold/api/WalletsInTest.java
index 5e53c4e..4b4ce09 100644
--- a/src/test/java/io/zold/api/WalletsInTest.java
+++ b/src/test/java/io/zold/api/WalletsInTest.java
@@ -81,6 +81,27 @@ public void createsWalletInFolder() throws IOException {
         );
     }
 
+    @Test(expected = UnsupportedOperationException.class)
+    public void createsRightWallet() throws IOException {
+        final Path path = this.folder.newFolder().toPath();
+        final String network = "zold";
+        final String pubkey = "AAAAB3NzaC1yc2EAAAADAQABAAABAQC";
+        final long id = 1;
+        final Wallet actual = new WalletsIn(path).create(
+            id, pubkey, network
+        );
+        final Wallet expected = new Wallet.Fake(
+            id,
+            pubkey,
+            network
+        );
+        MatcherAssert.assertThat(
+            "Created wallet with different values than expected",
+            actual,
+            new IsEqual<>(expected)
+        );
+    }
+
     @Test
     public void doesNotOverwriteExistingWallet() throws Exception {
         final Path path = this.folder.newFolder().toPath();