FEATURE
Change where a postcard points after you have mailed it
Printed paper is permanent. The link on it does not have to be. PostKnock resolves the destination at the moment someone scans, which means a card in a stranger's kitchen is still yours to redirect.
The destination is not baked into the card
What actually prints is a short tracked link unique to that recipient. It contains no destination and no UTM tags, just an identifier. When someone scans the QR code or types the link, PostKnock looks up where it should go at that instant, appends your UTM tags, and forwards them on.
So if the landing page moves, the promo ends, or you want next month's offer on last month's cards, you change one setting and every card already sitting on a fridge starts pointing somewhere new.
What that gets you in practice
Fix a broken link
Your booking page URL changed after the cards printed. Update the destination; nothing is wasted.
Retire an expired offer
Point late scanners at your current promotion instead of a dead landing page for a promo that ended.
Correct your UTM tags
Tagged the campaign wrong? Fix the tags and subsequent scans arrive in your analytics correctly labeled.
Set it per wave
Destination and UTMs cascade from your account to the campaign to the individual wave, most specific winning.
Redirects are served from a global edge network, so a scan resolves fast wherever the recipient is. Design and mailing dates freeze once a wave has sent. The tracking destination deliberately does not.
Who scanned, and when
Because each card carries its own link, every scan is a timestamped event attributed to a named contact, not an anonymous tick in a counter. The campaign tracking view shows total scans, unique scanners, and a per-contact list of who engaged with first and last scan times, plus a device and browser breakdown.
You also get
- Delivery and engagement stats per campaign, and delivery stats broken out per wave
- A campaign summary covering postcards sent and delivered, calls completed, call outcomes, scans, unique scanners, and qualified contacts
- A separate call analytics view for phone follow-up activity
What we do not claim
PostKnock does not do revenue attribution, ROI modeling, or cross-channel conversion funnels. It reports delivery, engagement, and call outcomes. Because your UTM tags ride along on every redirect, revenue attribution is something your own analytics tool can do with the traffic we hand it. We just do not pretend to do it for you.
Delivery status from the carrier
Direct mail usually goes into a black hole the moment you hand it over. PostKnock ingests carrier scan events as the piece moves and shows you where each card is:
| State | What it means |
|---|---|
| Producing | Accepted and printing, or handed to the carrier and not yet scanned in transit. |
| In transit | Moving through the mail stream, including local-area and out-for-delivery scans. |
| Delivered | Confirmed delivered. Where the carrier provides them, the carrier name and expected delivery date are shown on the card's detail view. |
| Returned | Came back undeliverable. This one changes what happens next. See below. |
PostKnock is First Class only, so pieces are tracked and returned rather than quietly discarded.
Returned mail stops the bleeding automatically
A bad address is not a one-time cost. Left alone, it gets mailed again on the next wave, and the wave after that, quietly billing you every time. PostKnock breaks that loop.
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1
The card comes back. PostKnock records the return against that contact.
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2
The contact is flagged unmailable. They are held out of every future dispatch (across all your campaigns, not just the one that bounced) until the address is corrected.
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3
They surface in the Fix Addresses wizard. A worklist of everyone with an address problem, with inline editing and address autocomplete. Correct one and they rejoin the campaign; skip one and they stay out.
One decision, asked once
The first time you hit undeliverable addresses, PostKnock asks how you want to handle them as a business: hold and correct them, or skip them. That choice is remembered for your whole organization so you are never asked again mid-campaign, and it is editable in Settings whenever you change your mind.
When the carrier never says “delivered”
Some pieces are simply never scanned as delivered. If PostKnock waited for a confirmation that never arrives, the follow-up call for that contact would wait forever.
So a daily reconciler looks for postcards that were mailed but never confirmed after ten days and schedules the follow-up call anyway, using your normal call delay. Crucially, it does not mark the postcard delivered. The status stays honest, so a late return notice can never contradict a delivery you were told happened.
Tracking Questions
Can I really change where a postcard's link goes after it is mailed?▼
Yes. What prints on the card is a short tracked link with no destination baked into it. PostKnock looks up the destination and your UTM tags at the moment of the scan, so updating them changes where every already-mailed card sends people. The design and mailing dates freeze once a wave has sent, but the tracking destination stays editable on purpose.
Do I know which specific person scanned a postcard?▼
Yes. Each card carries a link unique to that recipient, so a scan is recorded as a timestamped event tied to a named contact, with device and browser detail. The campaign tracking view shows total scans, unique scanners, and a per-contact list with first and last scan times.
What happens when a postcard is returned as undeliverable?▼
The contact is flagged as having an unmailable address and is held out of every future dispatch across all of your campaigns until the address is corrected. They appear in the Fix Addresses wizard, where you can edit the address inline with autocomplete or skip them. The first time this happens you pick an organization-wide policy, hold and correct or skip, and PostKnock remembers it.
Does PostKnock report ROI or revenue attribution?▼
No. PostKnock reports delivery status, scan and click engagement, and call outcomes. It does not model revenue, build conversion funnels, or do cross-channel attribution. Your UTM tags are appended on every redirect, so traffic arrives in your own analytics correctly labeled and you can attribute revenue there.
What if the carrier never confirms delivery?▼
A daily reconciler finds postcards that were mailed but never confirmed delivered after ten days and schedules the follow-up call anyway, using your normal call delay. The postcard is not marked delivered, so the status stays accurate and a late return notice cannot contradict it.
Know what happened to every card
Delivery status, scans by name, and links you can still change. No minimums, no contracts.
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