This worked perfect to me:

Code (Skript):

1. command /bal [<offline player>]:
2.     trigger:
3.         if arg 1 is not set:
4.             send "&bYour balance is &9 %player's balance%"
5.             stop
6.         if arg 1 is set:
7.             if player has permission "money.admin":
8.                 send "&bThe %arg 1%'s money is&9 %arg 1's balance%"
9.                 stop
10.             else:
11.                 send "&cNo permissions."
12.                 stop

 

That itself is not a skript problem. Remember that 'that' offline player must have entered the server and had activity on him balance.

 

Try this:

Code (Text):

1. command /offlinemoney [<offline player>]:
2.     permission: money.admin
3.     trigger:
4.         if arg-1 is set:
5.             message "&b%arg-1's balance%"

 

Hmm, can u try [<offlineplayer>]

 

Can you send a screenshot with '<none>' message? And show the player to whom you wrote in argument.

EDIT:
Try with this:

Code (Skript):

1. command /bal [<offline player>]:
2.     trigger:
3.         arg 1 is set:
4.             set {_bal} to arg 1's uuid
5.             set {_arg} to {_bal}'s balance
6.             send "&aBalance of %arg 1% is:&2 %{_arg}%"

 

just create a variable if the player quits:

On quit:
set {money.%player%} to player's balance

Than /money [<offlineplayer>]:
trigger:
send "%{money.%player%}%"

 

There you would be showing the balance of the command executor. If you want it with variables, it would be something like this:

Code (Skript):

1. on join:
2.     set {money.%player%} to player's balance
3.  
4. command /bal [<offline player>]:
5.     trigger:
6.         arg 1 is set:
7.             send "&a%arg 1%'s balance is:&2 %{money.%arg 1%}%" to sender

Also, it's not recommended to save player money in a variable. Variable contents will be lost once the server stops.

 

@couger44 oops u r right