A focused postcard plus phone-follow-up playbook designed for one job: catching drivers 60 days before their DMV deadline so they come back to you, not the cheapest station nearby.
Start Free2 years is a long time between visits. By the time the DMV reminder arrives, your past customer is on Google searching for "smog check near me" and pricing every station within 5 miles. The station that lands a postcard 60 days before that moment keeps the customer.
2 waves over 2 weeks, then back into the 2-year rotation. Below is exactly what mails when, and why.
Headline: "Your registration expires [month]" · Offer: One flat price OR one convenience promise · QR to online booking.
Written for the cohort's DMV expiration month, one campaign per month: "Your registration expires October 2026: get smogged now." Pass-guarantee or "in and out in 20 minutes, 7 days a week" messaging works equally well depending on your station's positioning. The follow-up call lands about 5 business days after delivery (the default; you can set 1 to 10): "Wanted to make sure you got the reminder. Want to come in this week?" About 70–80% of total visits come from this wave.
Headline: "Your DMV deadline is [month]" · Offer: Free retest if you fail or expedited "in by close, out today" promise.
Mailed only to non-responders, 14 days after Wave 1. Different angle: deadline urgency + downside protection. The "free retest if you fail" promise removes the biggest worry that pushes drivers to shop: the fear of paying twice. Generic urgency without that downside hedge underperforms.
All wave timing, call scripts, and copy direction are pre-configured for DMV-cycle recall. You only customize the offer (flat price, pass guarantee, free retest) and your station branding.
Export past customers from your station management software (GoldStar STAR Smog, ESP, or similar) as CSV. Include registration expiration date as a column so you can split the list by month. Our import wizard auto-maps name, address, and phone; other columns such as last visit date and next due date come along as custom fields.
Split your list into 12 monthly cohorts based on expiration date and launch each cohort 60 days before its DMV deadline. Wave 2 schedules itself 14 days later, only mailing to non-responders.
Each call has a pre-loaded script. Front desk logs the outcome (answered, voicemail, not interested, qualified). A qualified outcome ends that customer's wave.
Most independent smog check stations have 500–1,500 past customers across the full 2-year DMV cycle. Here's the math on an 800-customer run:
The real ROI shows up in cycle 2: customers who pass with you almost always come back in 2 years. Compounded over the second cycle, this playbook delivers ~4:1 with no incremental marketing.
Run your own numbers in the ROI calculator.
Free to explore. You only pay when you're ready to send. 30-day money-back guarantee on your first annual plan.
Single-wave postcard campaigns · Unlimited contacts · From $1.04/piece
Everything in Free + calls, sequencing · From $0.91/piece
Per-piece pricing includes printing + USPS First-Class postage. No hidden fees.
Drop in your station logo, hours, phone, and the renewal month. The Design Studio handles the rest.
Try the Design Studio →Renewal reminders are the highest-ROI smog check playbook, but PostKnock also runs win-back for lapsed customers and pass-guarantee promos. See the full lineup on the smog check hub.
See all smog check campaigns →500–1,000 customers for the first run, segmented by DMV renewal month. Smog check stations have a 2-year cycle so the active recall list is roughly half of total past customers in any given year. Mail each monthly cohort 60 days before its DMV expiration. If your full cohort exceeds 100 cards in a single month, that's plenty. The response volume should fit comfortably in front-desk capacity.
One simple price (e.g., "$49.75 smog check, same price for any car") beats coupons and percentage discounts. Smog check is a price-shopper-driven service. If your station's price is competitive, lead with the flat number. If you can't compete on price, lead with convenience: "7 days a week, no appointment, in-and-out in 20 minutes." Avoid stacking multiple offers. Clutter reduces response.
A card cannot merge a custom CSV column, so the month is not printed per customer. Instead, add an expiration month column to your CSV, split the list into one file per month, and run one campaign per month, typing that month into the headline (Your registration expires September 2026). Every card in a campaign carries the same deadline, which is the right one for everyone in it. The column stays on the contact record for sorting and for your front desk on the call.
Yes, with a different message. Failed customers know they need a re-test plus repair work, so a "we'll help you pass. STAR-certified retest available" message works much better than the standard renewal reminder. Segment failed customers from passed customers in your CSV (most station software flags this) and mail them a separate variant of the postcard.
PostKnock's default is 5 business days after delivery, and you can set it from 1 to 10 per campaign. Smog check is time-pressured (DMV deadline approaching) so the call should lean into urgency: "Wanted to make sure you got the reminder: your registration expires in 50 days. Want to come in this week? In and out in 20 minutes." Pre-loaded scripts in PostKnock guide the front desk through this exact flow.
Stop hoping past customers remember you. Start mailing the DMV-cycle reminder that locks in the next 2 years.
Start Free1 ANA (Association of National Advertisers), Response Rate Report 2023, published February 2024.