$Logfile = "F:\Code\VSC\PowerShell\Script\005 - Rename File by csv\logs.txt"

$Elements = Import-Csv -Path "C:\Users\cbo\Desktop\FZ Task\username2.csv"
$i = 1
 

foreach ($Element in $Elements) {
    
    $FilePath = "C:\Users\cbo\Desktop\FZ Task\Voutcher to send\" 
    $OldfileName = $i.ToString("000") + ".pdf"
    
    $Target =$FilePath + $OldfileName
    $FileName = $Element.Surname + " " + $Element.Name + ".pdf"

    Rename-Item -Path $Target -NewName $FileName

    LogWrite($FilePath+$FileName)

    $i++
}

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}