Birthday voucher (usually $10 off)

Cotton On & Co. Perks members get a "Birthday surprise" voucher when their date of birth is on file. Cotton On doesn't publish the amount; it's commonly reported as $10 off.

Conditions: Free Cotton On & Co. Perks membership; date of birth must be provided (sign up well before your birthday — the voucher is emailed). Reportedly no minimum spend, the whole $10 must be used in one transaction, and it's redeemable across Cotton On & Co brands.