DAS office (408 8000; Calle 100 No 11b-27; 7:30am-4:30pm Mon-Fri) A 30-day extension can be obtained here. Your passport, two photocopies of your passport (picture page and arrival stamp) and two passport-size photos are required. You may also need to show an air ticket out of the country. You have to pay the US$26 fee at the bank (which does not open until 8:30am, so there's little need to arrive too early). You get the extension on the spot.