How to Redeem Google Play Codes, Password Protect Purchases

How To Add Password Protection To Google Play To Prevent Accidental Purchases - Talk Android

Promo codes, Google Play's billing system

Google Play code says it is 'expired' when I try to redeem it, even though the card says no expiry! - Google Play Community

How to Redeem Your Google Play Gift Card - MyGiftCardSupply

Adjust Google Play to require a password for every purchase - CNET

Promo codes, Google Play's billing system

How to Redeem a Code in Google Play

Gift Cards - Specialty Gifts Cards - Restaurant Gift Cards

How to Redeem Google Play Codes, Password Protect Purchases