[Inn0cent]

You've forgot about setting the Robbed recently to 0, Lemme do it for you. You can also set up this thing in 1 timer instead of timer for every different robbery. But this way is more easy.

Code:

CMD:robthis(playerid, params[])
{
    #pragma unused params // we dont need the params
    if(IsPlayerInDynamicCP(playerid, CP_tatoo)) // Checking if player is in the checkpoint
	{
	    if(tatoorobbedrecently >=1) //checking if tatoo shop has been robbed recently
	    {
	        SendClientMessage(playerid, COLOR_RED, "Tatoo Shop has been robbed recently"); // sending error message
                return 1;
		}
                 SetTimer("robbedrecently", 180000, false);//Set a timer of 180 seconds to set the recentlyrobbed to 0
		ROBBING_TATOO[playerid] = 60; // setting the robbery timer
		tatoorobbedrecently =180; // Time the players needs to wait for starting an another robbery in the same place
	}

public robbedrecently()
{
    tatoorobbedrecently = 0;//Sets it to zero
}
	return 1;
}