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Order Error Settings

thanks.io includes built-in safeguards that stop orders from being sent to duplicate recipients or addresses the USPS classifies as vacant. These can be adjusted in your Mail Preferences.

How to find these settings​

  1. Click the gear icon (⚙️) in the top right.
  2. Click Mail Preferences.
  3. Scroll down past the Print Protect and Standard Mail Mode sections to find the three protection settings below.

The settings​

Enable Dedupe Failsafe​

(Under the Duplicate Prevention section)

When this is on, thanks.io will not send to the same recipient more than once within a 36-hour window. This protects against accidentally sending duplicate mailers when a recipient appears in multiple lists or a campaign triggers more than once.

This setting does not apply to gift cards.

Check for Vacant Addresses on Orders​

(Under the Flag Vacant Addresses section)

When this is on, thanks.io checks orders against USPS data and blocks mail going to addresses marked as "no-stat" - properties where no mail has been delivered in the past 90 days. These are typically vacant homes, new construction, or abandoned addresses.

Disable this only if you are intentionally targeting areas with high new construction, where addresses may not yet have postal history.

Auto-flag Invalid Addresses on Mailing Lists​

(Under the Flag Invalid Addresses section)

When this is on, addresses that are returned or flagged as invalid are automatically marked undeliverable and excluded from future orders. This prevents you from re-sending to a bad address.

Important warning​

If you turn off these protections and mail is sent to a bad address or a duplicate recipient, that mail costs money and will likely be returned or undeliverable. thanks.io cannot offer refunds for mailings that result from disabled safeguards.