diff -uNr a/bitcoin/src/init.cpp b/bitcoin/src/init.cpp
--- a/bitcoin/src/init.cpp 598bbbd1eab270cfb3e1114e7fa01caba27a2dfd2b57d04043f18ad34c9a1ecdbb896a06eae07a3def03f58a00cd57727af37a14d00353168407700f1ad3307a
+++ b/bitcoin/src/init.cpp 77919b26229f6b0de71504f170a2df528b73604633f286f80628a85c0fe90cf71c18937854436cd243654441d322a8ff29d9b28f2c9ea2628f5f6758d10be8fd
@@ -174,6 +174,7 @@
             "  -daemon          \t\t  " + _("Run in the background as a daemon and accept commands\n") +
             "  -debug           \t\t  " + _("Output extra debugging information\n") +
 	    "  -caneat          \t\t  " + _("Permit the use of 'eatblock'\n") +
+	    "  -verifyall       \t\t  " + _("Forbid the skipping of ECDSA signature verification between checkpoints.\n") +
             "  -logtimestamps   \t  "   + _("Prepend debug output with timestamp\n") +
             "  -printtoconsole  \t  "   + _("Send trace/debug info to console instead of debug.log file\n") +
             "  -rpcuser=<user>  \t  "   + _("Username for JSON-RPC connections\n") +
@@ -196,6 +197,7 @@
     fDebug = GetBoolArg("-debug");
     fDaemon = GetBoolArg("-daemon");
     fCanEat = GetBoolArg("-caneat");
+    fVerifyAll = GetBoolArg("-verifyall");
 
     if (fDaemon)
         fServer = true;
diff -uNr a/bitcoin/src/main.cpp b/bitcoin/src/main.cpp
--- a/bitcoin/src/main.cpp 16256a693b6dd1ecf2224d2055ec17ccd1d24a9c0f2cb0668ec7329f5f959a3fc0a3db66e1400b18eee1bcc4b3bc5a53d98612282d0a8827f1cc895307fc8d2e
+++ b/bitcoin/src/main.cpp 30ee1c16668cb21cdf3b476a5d82c665ef9a0bbede9eba887692e65d48bae74d639085b52b98313283749ae11398a74270e929fe7aae1794d0d4c8b141292ebe
@@ -832,7 +832,7 @@
             // Skip ECDSA signature verification when connecting blocks (fBlock=true)
             // before the last blockchain checkpoint. This is safe because block merkle hashes are
             // still computed and checked, and any change will be caught at the next checkpoint.
-            if (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate())))
+            if (fVerifyAll || (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate()))))
                 // Verify signature
                 if (!VerifySignature(txPrev, *this, i))
                     return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
diff -uNr a/bitcoin/src/util.cpp b/bitcoin/src/util.cpp
--- a/bitcoin/src/util.cpp 29436752078f28a0d8c38c0a8455ae3d4b17eeb8f8bf4cabad0a3dbc2e28ddebcedf5a160ea0efcabd74be32016efbf890bba0df8e09efd2718735379dbbac7b
+++ b/bitcoin/src/util.cpp 9ed13d4723a1daad64658d59ae99a776253505faf10619b4a011173b66b4a64b852007296f81f40537fde60c44af475cb4c168cc725dbf59273d8cea34371909
@@ -21,6 +21,7 @@
 bool fPrintToConsole = false;
 bool fPrintToDebugger = false;
 bool fCanEat = false;
+bool fVerifyAll = false;
 char pszSetDataDir[MAX_PATH] = "";
 bool fRequestShutdown = false;
 bool fShutdown = false;
diff -uNr a/bitcoin/src/util.h b/bitcoin/src/util.h
--- a/bitcoin/src/util.h 4d2a5c6a0c1f82b5f172a1161e686e54ce17cc65614ef9457b1745f5fb5dddb4056d84ac207d6be1853a576060ea9631fb2cbd0778e0bf022a09b19b24078188
+++ b/bitcoin/src/util.h 235c9e2b087f65731a530fc76df548a427a1833ea3a4ef8791a89b938c74553f7d0117861265c687952ce91f7e0301a1f35cb3436c4cc87d230a443fcb197ef6
@@ -111,6 +111,7 @@
 extern bool fPrintToConsole;
 extern bool fPrintToDebugger;
 extern bool fCanEat;
+extern bool fVerifyAll;
 extern char pszSetDataDir[MAX_PATH];
 extern bool fRequestShutdown;
 extern bool fShutdown;