It's almost similar process when opening a bank account, the stock-brokerage staff will require you to fill out and sign the application form called Customer Account Information Form (CAIF), trading agreement, and submit the following documents;

Present copies of any two (2) of the following:
•    Passport
•    Philippine driver's license
•    SSS ID (1999 credit card type only) 
•    Company ID if employed by top 2500 corporations (with photo)
•    Major credit card with picture
•...
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