@Rafael ********
if you want to be "extra" sure, in Penang could ask you to show bank statement with at least 50,000 baht; and, along with copy of your apartment lease, copy of house book (tabien ban) and signed copy of owner's ID.
Show up in the morning from 9 to 10am only and you can pick up your passport the day after, from 2 to 3pm only.