Hi all ,

I have written the trigger on task  , whenever i closed the task i will generated another task after 5 days from the due date ,

But it fire the trigger exactly twice in my salesforce org,

I found that some other workflow make my trigger to fire again , I have also attached the crietria and field update of that workflow below for the reference ,

Evaluation Criteria: Evaluate the rule when a record is created, and any time it’s edited to subsequently meet criteria

Rule Criteria : Task: StatusEQUALSCompleted

Field Update: some date/time field in the task .

trigger TaskforEnrolledStatus on Task (before update) {
Date mydate;
List<Task> tasksupd = new List<Task>();
for(Task tsk: Trigger.new)
{
Task oldtask=Trigger.oldMap.get(tsk.Id);
Task newtask=Trigger.newMap.get(tsk.Id);

if(newtask.Status=='Completed'&& oldtask.Status!=newtask.Status ){
Account aa=[Select id,Account_Status__c from Account where id=:newtask.whatId];
if(aa.Account_Status__c=='Accepted')
{
mydate=newtask.ActivityDate+5;

Task tskupd=new Task(ownerId=newtask.ownerId,whatId=newtask.whatId,Subject='Send11 Letter',Priority='Normal',Status='Not Started',ActivityDate=mydate);

tasksupd.add(tskupd);

}
Database.insert(tasksupd);

}
}
}

My Question here is like Order of execution on salesforce is trigger and then workflow ,

1.Trigger will fire and create the task when we close one task, and then workflow will fire and update the date/time field and 

How come the trigger will fire again ?.

Thanks in advance