ShopeePay is Shopee’s official in-app e-wallet regulated by the Bangko Sentral ng Pilipinas. This allows users to quickly and conveniently top-up, purchase, and withdraw through ShopeePay.
Go to https://giftaway.ph/shopeepay/redemption to redeem your Shopeepay eGift and follow these instructions Open the Shopee app and go to ShopeePay. Select Cash In and enter the eGift amount. Select "Payment Center" then choose ECpay as the payment method and confirm. Tap "Pay Now" and enter the generated Reference No. from the Shopee app on this form.
I thought this is a voucher code like on Lazada. Well it's my fault. Anyway, instantly received the code and it worked on my shopee pay.