diff --git a/server/exports.lua b/server/exports.lua
index 69b25cc..3b0b37f 100644
--- a/server/exports.lua
+++ b/server/exports.lua
@@ -1,62 +1,159 @@
 -- Single add job function which should only be used if you planning on adding a single job
-local function AddJob(jobName, job)
+local function AddJob(jobName, job, source)
+    if type(jobName) ~= "string" then
+        print('Failed to add the item, name is not a string')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the job, name is not a string', 'error', 3000)
+        end
+        return false
+    end
+
+    if QBCore.Shared.Jobs[jobName] ~= nil then
+        print('Failed to add the item, item already exists')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the job, job already exists', 'error', 3000)
+        end
+        return false
+    end
+
     QBCore.Shared.Jobs[jobName] = job
     TriggerClientEvent('QBCore:Client:OnSharedUpdate', -1,'Jobs', jobName, job)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddJob = AddJob
 exports('AddJob', AddJob)
 
 -- Multiple Add Jobs
 local function AddJobs(jobs)
+    local shouldContinue = true
     for key, value in pairs(jobs) do
+        if type(key) ~= "string" then
+            print('Failed to add the job, name is not a string')
+            shouldContinue = false
+            goto continue
+        end
+
+        if QBCore.Shared.Jobs[key] ~= nil then
+            print('Failed to add the job, job already exists: ' .. key)
+            shouldContinue = false
+            goto continue
+        end
+
         QBCore.Shared.Jobs[key] = value
+        ::continue::
     end
 
+    if not shouldContinue then return false end
     TriggerClientEvent('QBCore:Client:OnSharedUpdateMultiple', -1, 'Jobs', jobs)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddJobs = AddJobs
 exports('AddJobs', AddJobs)
 
 -- Single add item
-local function AddItem(itemName, item)
+local function AddItem(itemName, item, source)
+    if type(itemName) ~= "string" then
+        print('Failed to add the item, name is not a string')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the item, name is not a string', 'error', 3000)
+        end
+        return false
+    end
+    if QBCore.Shared.Items[itemName] ~= nil then
+        print('Failed to add the item, item already exists')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the item, item already exists', 'error', 3000)
+        end
+        return false
+    end
+
     QBCore.Shared.Items[itemName] = item
     TriggerClientEvent('QBCore:Client:OnSharedUpdate', -1, 'Items', itemName, item)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddItem = AddItem
 exports('AddItem', AddItem)
 
 -- Multiple Add Items
 local function AddItems(items)
+    local shouldContinue = true
     for key, value in pairs(items) do
-        QBCore.Shared.Items[key] = value
-    end
+        if type(key) ~= "string" then
+            print('Failed to add the item, name is not a string')
+            shouldContinue = false
+            goto continue
+        end
 
+        if QBCore.Shared.Items[key] ~= nil then
+            print('Failed to add the item, item already exists: ' .. key)
+            shouldContinue = false
+            goto continue
+        end
+
+        QBCore.Shared.Items[key] = value
+        ::continue::
+    end
+    if not shouldContinue then return false end
     TriggerClientEvent('QBCore:Client:OnSharedUpdateMultiple', -1, 'Items', items)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddItems = AddItems
 exports('AddItems', AddItems)
 
 -- Single Add Gang
-local function AddGang(gangName, gang)
+local function AddGang(gangName, gang, source)
+    if type(gangName) ~= "string" then
+        print('Failed to add the gang, name is not a string')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the gang, name is not a string', 'error', 3000)
+        end
+        return false
+    end
+    if QBCore.Shared.Gangs[gangName] ~= nil then
+        print('Failed to add the gang, gang already exists')
+        if source ~= nil and source ~= '' then
+            TriggerClientEvent('QBCore:Notify', source, 'Failed to add the gang, gang already exists', 'error', 3000)
+        end
+        return false
+    end
+
     QBCore.Shared.Gangs[gangName] = gang
     TriggerClientEvent('QBCore:Client:OnSharedUpdate', -1,'Gangs', gangName, gang)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddGang = AddGang
 exports('AddGang', AddGang)
 
 -- Multiple Add Gangs
 local function AddGangs(gangs)
+    local shouldContinue = true
+
     for key, value in pairs(gangs) do
+        if type(key) ~= "string" then
+            print('Failed to add the gang, name is not a string')
+            shouldContinue = false
+            goto continue
+        end
+
+        if QBCore.Shared.Gangs[key] ~= nil then
+            print('Failed to add the gang, gang already exists: ' .. key)
+            shouldContinue = false
+            goto continue
+        end
+
         QBCore.Shared.Gangs[key] = value
+        ::continue::
     end
 
+    if not shouldContinue then return false end
     TriggerClientEvent('QBCore:Client:OnSharedUpdateMultiple', -1, 'Gangs', gangs)
     TriggerEvent('QBCore:Server:UpdateObject')
+    return true
 end
 QBCore.Functions.AddGangs = AddGangs
 exports('AddGangs', AddGangs)
\ No newline at end of file