It seems that some time ago some legislation was passed enabling anyone who needed to transact with the Philippines DFA (or other government departments) to obtain a Tax Identification Number (TIN).
BIR Form 1904 - Application for Registration of One Time Taxpayer And Persons Registering Under EO 98 (securing a TIN to be able to transact with any government office)
-Birth certificate or any valid identification showing name, address and birth date of the applicant
- Accomplish BIR Form 1904 and submit the same, together with the required attachments, to the Revenue District Office having jurisdiction over residence of the applicant.”
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