diff --git a/src/miner.cpp b/src/miner.cpp
index f52541eb2..d0f59101f 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -239,7 +239,7 @@ bool BlockAssembler::TestTransaction(const CTransactionRef& tx, PocketBlockRef&
     // Payload should be in operative table Transactions
     if (!ptx)
     {
-        LogPrint(BCLog::STAKEMODIF, "Warning: build block skip transaction %s with result 'NOT FOUND'\n",
+        LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction %s with result 'NOT FOUND'\n",
             tx->GetHash().GetHex());
 
         return false;
@@ -248,7 +248,7 @@ bool BlockAssembler::TestTransaction(const CTransactionRef& tx, PocketBlockRef&
     // Check consensus
     if (auto[ok, result] = PocketConsensus::SocialConsensusHelper::Check(tx, ptx, ChainActive().Height() + 1); !ok)
     {
-        LogPrint(BCLog::STAKEMODIF, "Warning: build block skip transaction %s with check result %d\n",
+        LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction %s with check result %d\n",
             tx->GetHash().GetHex(), (int) result);
 
         return false;
@@ -257,11 +257,30 @@ bool BlockAssembler::TestTransaction(const CTransactionRef& tx, PocketBlockRef&
     // Validate consensus
     if (auto[ok, result] = PocketConsensus::SocialConsensusHelper::Validate(tx, ptx, pblockTemplate, ChainActive().Height() + 1); !ok)
     {
-        LogPrint(BCLog::STAKEMODIF, "Warning: build block skip transaction %s with validate result %d\n",
+        LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction %s with validate result %d\n",
             tx->GetHash().GetHex(), (int) result);
 
         return false;
     }
+    
+    CCoinsViewCache view(&::ChainstateActive().CoinsTip());
+    for (unsigned int i = 0; i < tx->vin.size(); ++i) {
+        const COutPoint &prevout = tx->vin[i].prevout;
+        const Coin& coin = view.AccessCoin(prevout);
+        if (coin.IsSpent())
+        {
+            LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction: tx - %s, prev - %s is spent\n", tx->GetHash().GetHex(), prevout.hash.GetHex());
+            return false;
+        }
+
+        // If prev is pocketnet, check that it's matured
+        if (ChainActive().Height() + 1 - coin.nHeight < POCKETNET_MATURITY)
+        {
+            LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction: tx - %s, prev - %s, %d - %d = %d < %d\n",
+                tx->GetHash().GetHex(), prevout.hash.GetHex(), ChainActive().Height() + 1, coin.nHeight, ChainActive().Height() + 1 - coin.nHeight, POCKETNET_MATURITY);
+            return false;
+        }
+    }
 
     // All is good - save for descendants
     pblockTemplate->push_back(ptx);
@@ -289,10 +308,12 @@ bool BlockAssembler::TestPackageTransactions(const CTxMemPool::setEntries& packa
     {
         if (!IsFinalTx(it->GetTx(), nHeight, nLockTimeCutoff))
         {
+            LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction: tx - %s, height - %d, locktime - %d\n", it->GetTx().GetHash().GetHex(), nHeight, nLockTimeCutoff);
             return false;
         }
         if (!fIncludeWitness && it->GetTx().HasWitness())
         {
+            LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction: tx - %s, height - %d, HasWitness\n", it->GetTx().GetHash().GetHex(), nHeight);
             return false;
         }
     }
@@ -473,7 +494,7 @@ void BlockAssembler::addPackageTxs(int& nPackagesSelected, int& nDescendantsUpda
 
         if (packageFees < minFee)
         {
-            LogPrintf("tx - %s, fee - %s, minFee - %s\n", iter->GetTx().GetHash().GetHex(), packageFees, minFee);
+            LogPrint(BCLog::SELECTCOINS, "Warning: build block skip transaction %s, fee (%s) < minFee (%s)\n", iter->GetTx().GetHash().GetHex(), packageFees, minFee);
 
             if (fUsingModified)
             {