This depends on the reward that was issued.
PayPal
In the instance that a PayPal reward is unclaimed by the recipient after thirty (30) days, the amount will roll back and be placed back into your PayPal balance. The recipient will no longer be able to claim that reward.
Gift Card (Tango)
Rewarding with a gift card is the equivalent of handing out cash. Once it has been issued, we are unable to revoke the reward.
If the gift card was sent to an incorrect email address and has not yet been claimed, please contact our support team and we will assist you with resending the reward.
Reward Links do not expire. Once a Reward Link is delivered to a recipient, it is their property and does not expire.
Prepaid Visa or Mastercard card rewards expire after 4 months. Funds are forfeited and wiped from prepaid cards once they have expired. The funds do not get credited back to your account after the prepaid card has expired.
Wise
If a recipient does not claim a payment within 1 week, funds will be returned to your Wise Business Account. When the payment is returned the following will occur in Referral Rock:
The payment will show as "Rollback" in Payment History
The reward will revert back to the pending status to be reissued
Admins will receive a notification if the reward is not on an automated payout schedule