Filipino social gatherings take on a different time frame. Expect arrival to these events as much as a half hour after the agreed meeting time. If your Filipino counterpart has a title, use it. When you don't know the title, stick to Mr., Mrs. or Ms. followed by the last name. Soon your counterpart will most likely insist that you call him or her by first name.
Informality generally carries over to dress in a Filipino business setting.
Business attire for men ranges from a heavily embroidered open-necked shirts, known locally as barong tagalogs , to conservative suits. But more often local men dress for comfort and wear a white or pastel solid shirt - tie optional. To be safe, choose this look for business, and leave the suit at home unless you're planning to attend a black-tie function. Filipino businesswomen commonly sport designer clothes and shoes, but often shy away from the basic blacks and opt for a more colorful look. Women traveling to the Philippines on business will fare well dressing in a like manner.