diff --git a/contracts/modules/TransferManager/ManualApprovalTransferManager.sol b/contracts/modules/TransferManager/ManualApprovalTransferManager.sol
index fd888680a..d95241e9a 100644
--- a/contracts/modules/TransferManager/ManualApprovalTransferManager.sol
+++ b/contracts/modules/TransferManager/ManualApprovalTransferManager.sol
@@ -113,7 +113,6 @@ contract ManualApprovalTransferManager is ITransferManager {
     * @param _expiryTime is the time until which the transfer is allowed
     */
     function addManualApproval(address _from, address _to, uint256 _allowance, uint256 _expiryTime) public withPerm(TRANSFER_APPROVAL) {
-        require(_from != address(0), "Invalid from address");
         require(_to != address(0), "Invalid to address");
         /*solium-disable-next-line security/no-block-members*/
         require(_expiryTime > now, "Invalid expiry time");
@@ -129,7 +128,6 @@ contract ManualApprovalTransferManager is ITransferManager {
     * @param _expiryTime is the time until which the transfer is blocked
     */
     function addManualBlocking(address _from, address _to, uint256 _expiryTime) public withPerm(TRANSFER_APPROVAL) {
-        require(_from != address(0), "Invalid from address");
         require(_to != address(0), "Invalid to address");
         /*solium-disable-next-line security/no-block-members*/
         require(_expiryTime > now, "Invalid expiry time");
@@ -144,7 +142,6 @@ contract ManualApprovalTransferManager is ITransferManager {
     * @param _to is the address to which transfers are approved
     */
     function revokeManualApproval(address _from, address _to) public withPerm(TRANSFER_APPROVAL) {
-        require(_from != address(0), "Invalid from address");
         require(_to != address(0), "Invalid to address");
         delete manualApprovals[_from][_to];
         emit RevokeManualApproval(_from, _to, msg.sender);
@@ -156,7 +153,6 @@ contract ManualApprovalTransferManager is ITransferManager {
     * @param _to is the address to which transfers are approved
     */
     function revokeManualBlocking(address _from, address _to) public withPerm(TRANSFER_APPROVAL) {
-        require(_from != address(0), "Invalid from address");
         require(_to != address(0), "Invalid to address");
         delete manualBlockings[_from][_to];
         emit RevokeManualBlocking(_from, _to, msg.sender);
diff --git a/test/j_manual_approval_transfer_manager.js b/test/j_manual_approval_transfer_manager.js
index 709991b92..0461f287a 100644
--- a/test/j_manual_approval_transfer_manager.js
+++ b/test/j_manual_approval_transfer_manager.js
@@ -321,18 +321,6 @@ contract("ManualApprovalTransferManager", accounts => {
             assert.equal((await I_SecurityToken.balanceOf(account_investor1)).toNumber(), web3.utils.toWei("5", "ether"));
         });
 
-        it("Should fail to add a manual approval because invalid _from address", async () => {
-            await catchRevert(
-                I_ManualApprovalTransferManager.addManualApproval(
-                    "",
-                    account_investor4,
-                    web3.utils.toWei("2", "ether"),
-                    latestTime() + duration.days(1),
-                    { from: token_owner }
-                )
-            );
-        });
-
         it("Should fail to add a manual approval because invalid _to address", async () => {
             await catchRevert(
                 I_ManualApprovalTransferManager.addManualApproval(
@@ -367,6 +355,16 @@ contract("ManualApprovalTransferManager", accounts => {
             );
         });
 
+        it("Add a manual approval for a 5th investor from issuance", async () => {
+            await I_ManualApprovalTransferManager.addManualApproval(
+                "",
+                account_investor5,
+                web3.utils.toWei("2", "ether"),
+                latestTime() + duration.days(1),
+                { from: token_owner }
+            );
+        });
+
         it("Should fail to add a manual approval because allowance is laready exists", async () => {
             await catchRevert(
                 I_ManualApprovalTransferManager.addManualApproval(
@@ -379,10 +377,6 @@ contract("ManualApprovalTransferManager", accounts => {
             );
         });
 
-        it("Should fail to revoke manual approval because invalid _from address", async () => {
-            await catchRevert(I_ManualApprovalTransferManager.revokeManualApproval("", account_investor4, { from: token_owner }));
-        });
-
         it("Should fail to revoke manual approval because invalid _to address", async () => {
             await catchRevert(I_ManualApprovalTransferManager.revokeManualApproval(account_investor1, "", { from: token_owner }));
         });
@@ -409,6 +403,15 @@ contract("ManualApprovalTransferManager", accounts => {
             assert.equal((await I_SecurityToken.balanceOf(account_investor4)).toNumber(), web3.utils.toWei("1", "ether"));
         });
 
+        it("Approval fails with wrong from to address", async () => {
+          await catchRevert(I_SecurityToken.transfer(account_investor5, web3.utils.toWei("1", "ether"), { from: account_investor1 }));
+        });
+
+        it("Use 100% of issuance approval", async () => {
+            await I_SecurityToken.mint(account_investor5, web3.utils.toWei("2", "ether"), { from: token_owner });
+            assert.equal((await I_SecurityToken.balanceOf(account_investor5)).toNumber(), web3.utils.toWei("2", "ether"));
+        });
+
         it("Check verifyTransfer without actually transferring", async () => {
             let verified = await I_SecurityToken.verifyTransfer.call(
                 account_investor1,
@@ -439,14 +442,6 @@ contract("ManualApprovalTransferManager", accounts => {
             await I_SecurityToken.transfer(account_investor2, web3.utils.toWei("1", "ether"), { from: account_investor1 });
         });
 
-        it("Should fail to add a manual block because invalid _from address", async () => {
-            await catchRevert(
-                I_ManualApprovalTransferManager.addManualBlocking("", account_investor2, latestTime() + duration.days(1), {
-                    from: token_owner
-                })
-            );
-        });
-
         it("Should fail to add a manual block because invalid _to address", async () => {
             await catchRevert(
                 I_ManualApprovalTransferManager.addManualBlocking(account_investor1, "", latestTime() + duration.days(1), {
@@ -477,10 +472,6 @@ contract("ManualApprovalTransferManager", accounts => {
             await catchRevert(I_SecurityToken.transfer(account_investor2, web3.utils.toWei("1", "ether"), { from: account_investor1 }));
         });
 
-        it("Should fail to revoke manual block because invalid _from address", async () => {
-            await catchRevert(I_ManualApprovalTransferManager.revokeManualBlocking("0x0", account_investor2, { from: token_owner }));
-        });
-
         it("Should fail to revoke manual block because invalid _to address", async () => {
             await catchRevert(I_ManualApprovalTransferManager.revokeManualBlocking(account_investor1, "0x0", { from: token_owner }));
         });