After I passed my PMP exam, I logged a case with SkillsFuture to claim my exam fees . They called it an appeal for refund.
The staff were thorough about my results, exam date and payment method. The exam date used the last reminder email from Pearson. Payment method I used my credit card statement. PMI does not issue a receipt or I missed printing it. Luckily my PMI profile showed the last 4 digits of the credit card number and the amount paid (US$405).
Once that is approved, I need to fill in a payment request. That goes for another approval cycle. After receiving the second approval, it took 3 weeks for SkillsFuture to PayNow me.
Overall, from the first email to payment took about 6 weeks. I replied to their questions within a day.