diff --git a/lib/index.js b/lib/index.js
index 2d56db2..6a3713c 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -212,7 +212,11 @@ class SSP extends EventEmitter {
   async command(command, args) {
     command = command.toUpperCase()
     if (commandList[command] === undefined) {
-      throw new Error('Command not found')
+      throw new Error('Unknown command')
+    }
+
+    if (commandList[command].encrypted && this.keys.encryptKey === null) {
+      throw new Error('Command requires ecnryption')
     }
 
     if (this.state.processing) {
diff --git a/lib/utils.js b/lib/utils.js
index a431456..2a85c0c 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -983,11 +983,7 @@ function generateKeys() {
  */
 function getPacket(command, argBytes, sequence, encryptKey = null, eCount) {
   if (commandList[command].args && argBytes.length === 0) {
-    throw new Error('Args missings')
-  }
-
-  if (commandList[command].encrypted && encryptKey === null) {
-    throw new Error('Command requires ecnryption')
+    throw new Error('Command requires arguments')
   }
 
   const SEQ_SLAVE_ID = sequence
diff --git a/lib/utils.test.js b/lib/utils.test.js
index 725fb8d..56bfdf7 100644
--- a/lib/utils.test.js
+++ b/lib/utils.test.js
@@ -797,14 +797,7 @@ describe('getPacket', () => {
     const args = Buffer.from([])
     const sequence = 1
 
-    expect(() => getPacket('SET_CHANNEL_INHIBITS', args, sequence)).toThrow('Args missings')
-  })
-
-  test('throws error when encryption key is missing for a command that requires encryption', () => {
-    const args = Buffer.from([1, 2, 3])
-    const sequence = 1
-
-    expect(() => getPacket('PAYOUT_AMOUNT', args, sequence)).toThrow('Command requires ecnryption')
+    expect(() => getPacket('SET_CHANNEL_INHIBITS', args, sequence)).toThrow('Command requires arguments')
   })
 
   test('generates packet with encrypted data when encryption key is provided', () => {
@@ -830,14 +823,6 @@ describe('getPacket', () => {
     const result = getPacket('PAYOUT_AMOUNT', args, sequence, key, count)
     expect(result).toBeDefined() // Assert whatever you expect from the result
   })
-
-  test('throws error when encryption key is missing for PAYOUT_AMOUNT command that requires encryption', () => {
-    const args = argsToByte('PAYOUT_AMOUNT', { amount: 5, country_code: 'EUR' }, 6)
-    const sequence = 1
-    const count = 1
-
-    expect(() => getPacket('PAYOUT_AMOUNT', args, sequence, null, count)).toThrow('Command requires ecnryption')
-  })
 })
 
 describe('createSSPHostEncryptionKey', () => {