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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.

Mail Preferences holds more than these three settings. The Gift Card Redemption card on the same page controls whether recipients must supply an email or phone before claiming a gift card - see Gift Card Redemption Contact Info.

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.

This setting covers mail sends only. Duplicate purchases of mailing list data are handled separately - see below.

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.

Duplicate Radius Search purchases​

Separately from the settings above, an identical Radius Search purchase from your account is refused within 24 hours of the first one, so a repeated request does not buy the same records twice. The refusal returns the mailing list ID (and the order ID, when the search was bought as part of an order) from the original purchase.

This protection applies when you buy a Radius Search list from the Mailing Lists screen, through the API, or through Zapier. It is not controlled from Mail Preferences, and turning off Enable Dedupe Failsafe has no effect on it. Details, including what counts as an identical purchase and when a retry is allowed straight away, are in Duplicate purchase protection.

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.