diff --git a/contrib/auditor-report.tex.j2 b/contrib/auditor-report.tex.j2
index cfd613a07..edcab8cf8 100644
--- a/contrib/auditor-report.tex.j2
+++ b/contrib/auditor-report.tex.j2
@@ -1107,7 +1107,7 @@ have a clear financial impact.
   {{ item.row }} &
   {{ item.diagnostic }} \\
 \nopagebreak
-  \multicolumn{3}{l}{ {\tiny {\tt \truncate{\textwidth}{ {{ item.wire_offset_hash }} } } } } \\ \hline
+  \multicolumn{3}{l}{ {\tiny {\tt \truncate{\textwidth}{ {{ item.id }} } } } } \\ \hline
 {% endfor %}
   \end{longtable}
 {% endif %}
diff --git a/src/auditor/taler-helper-auditor-wire.c b/src/auditor/taler-helper-auditor-wire.c
index 28a87a391..2596a31eb 100644
--- a/src/auditor/taler-helper-auditor-wire.c
+++ b/src/auditor/taler-helper-auditor-wire.c
@@ -1318,7 +1318,7 @@ complain_out_not_found (void *cls,
                                                      "profit_drains"),
                             GNUNET_JSON_pack_uint64 ("row",
                                                      serial),
-                            GNUNET_JSON_pack_data_auto ("wtid",
+                            GNUNET_JSON_pack_data_auto ("id",
                                                         &roi->details.wtid),
                             GNUNET_JSON_pack_string ("diagnostic",
                                                      "invalid signature")));
@@ -1695,7 +1695,7 @@ reserve_in_cb (void *cls,
                                                  "reserves_in"),
                         GNUNET_JSON_pack_uint64 ("row",
                                                  rowid),
-                        GNUNET_JSON_pack_data_auto ("wire_offset_hash",
+                        GNUNET_JSON_pack_data_auto ("id",
                                                     &rii->row_off_hash),
                         GNUNET_JSON_pack_string ("diagnostic",
                                                  "duplicate wire offset")));
@@ -2096,7 +2096,7 @@ reserve_closed_cb (void *cls,
                                                  "reserves_closures"),
                         GNUNET_JSON_pack_uint64 ("row",
                                                  rowid),
-                        GNUNET_JSON_pack_data_auto ("reserve_pub",
+                        GNUNET_JSON_pack_data_auto ("id",
                                                     reserve_pub),
                         TALER_JSON_pack_amount ("amount_with_fee",
                                                 amount_with_fee),
diff --git a/src/exchange/taler-exchange-httpd_reserves_purse.c b/src/exchange/taler-exchange-httpd_reserves_purse.c
index f7266bd24..930acf542 100644
--- a/src/exchange/taler-exchange-httpd_reserves_purse.c
+++ b/src/exchange/taler-exchange-httpd_reserves_purse.c
@@ -536,6 +536,23 @@ TEH_handler_reserves_purse (
                                           reserve_pub);
     TALER_payto_hash (payto_uri,
                       &rpc.h_payto);
+    TEH_METRICS_num_verifications[TEH_MT_SIGNATURE_EDDSA]++;
+    if (GNUNET_OK !=
+        TALER_wallet_purse_merge_verify (payto_uri,
+                                         rpc.merge_timestamp,
+                                         &rpc.pd.purse_pub,
+                                         &rpc.merge_pub,
+                                         &rpc.merge_sig))
+    {
+      GNUNET_break_op (0);
+      GNUNET_JSON_parse_free (spec);
+      GNUNET_free (payto_uri);
+      return TALER_MHD_reply_with_error (
+        connection,
+        MHD_HTTP_FORBIDDEN,
+        TALER_EC_EXCHANGE_RESERVES_PURSE_MERGE_SIGNATURE_INVALID,
+        NULL);
+    }
     GNUNET_free (payto_uri);
   }
   GNUNET_assert (GNUNET_OK ==
@@ -627,21 +644,6 @@ TEH_handler_reserves_purse (
       TALER_EC_EXCHANGE_PURSE_CREATE_SIGNATURE_INVALID,
       NULL);
   }
-  if (GNUNET_OK !=
-      TALER_wallet_purse_merge_verify (TEH_base_url,
-                                       rpc.merge_timestamp,
-                                       &rpc.pd.purse_pub,
-                                       &rpc.merge_pub,
-                                       &rpc.merge_sig))
-  {
-    GNUNET_break_op (0);
-    GNUNET_JSON_parse_free (spec);
-    return TALER_MHD_reply_with_error (
-      connection,
-      MHD_HTTP_FORBIDDEN,
-      TALER_EC_EXCHANGE_RESERVES_PURSE_MERGE_SIGNATURE_INVALID,
-      NULL);
-  }
   if (GNUNET_OK !=
       TALER_wallet_account_merge_verify (rpc.merge_timestamp,
                                          &rpc.pd.purse_pub,
diff --git a/src/lib/exchange_api_purse_create_with_merge.c b/src/lib/exchange_api_purse_create_with_merge.c
index 9fd1d552f..460239fc8 100644
--- a/src/lib/exchange_api_purse_create_with_merge.c
+++ b/src/lib/exchange_api_purse_create_with_merge.c
@@ -454,11 +454,18 @@ TALER_EXCHANGE_purse_create_with_merge (
                                   &pcm->purse_value_after_fees,
                                   purse_priv,
                                   &pcm->purse_sig);
-  TALER_wallet_purse_merge_sign (exchange->url,
-                                 merge_timestamp,
-                                 &pcm->purse_pub,
-                                 merge_priv,
-                                 &pcm->merge_sig);
+  {
+    char *payto_uri;
+
+    payto_uri = TALER_reserve_make_payto (exchange->url,
+                                          &pcm->reserve_pub);
+    TALER_wallet_purse_merge_sign (payto_uri,
+                                   merge_timestamp,
+                                   &pcm->purse_pub,
+                                   merge_priv,
+                                   &pcm->merge_sig);
+    GNUNET_free (payto_uri);
+  }
   TALER_wallet_account_merge_sign (merge_timestamp,
                                    &pcm->purse_pub,
                                    pcm->purse_expiration,