A focused postcard plus phone-follow-up playbook designed for one job: bringing your past customers back when they're due.
Start FreeMost service drift isn't competitive. It's procrastination. Your customer hits 5,000 miles past their last oil change and the dashboard light starts feeling normal. The shop that mails the reminder gets the visit.
2 waves over 2 weeks, then back into the rotation. Below is exactly what mails when, and why.
Headline: "Time for your next service" · Offer: A set dollar amount off + free multi-point inspection · QR to online booking.
Personal, mileage-specific copy: "It's been 6 months since your last oil change. Time to keep your engine running smooth." 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 our reminder. Can we get you on the schedule this week?" About 70% of total visits come from this wave.
Headline: "Before the heat hits" or "Before the cold snap" · Offer: Free seasonal check (AC, battery, brakes).
Mailed only to non-responders, 14 days after Wave 1. Different angle: seasonal hook. AC service before summer, battery test before winter, brake check before the rainy season. The seasonal frame gives you a fresh reason to reach out without feeling repetitive.
All wave timing, call scripts, and copy direction are pre-configured for service reminder campaigns. You only customize the offer (10% off, $25 off, free inspection) and your shop branding.
Export past customers from Mitchell 1, Shop-Ware, AutoLeap, Tekmetric, or any shop management software as CSV. Filter by last visit date older than 90 days. Our import wizard auto-maps name, address, and phone; other columns such as last service come along as custom fields.
Wave 1 postcards print and drop into USPS within 1–2 business days. Your call queue populates 5 business days after delivery (the default; you can set 1 to 10). 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 shops have 800–1,500 past customers in the last 18 months. Here's the math on a 1,000-customer run through this exact playbook:
11.0:1 ROI, before any upsell to brakes, tires, or 60K service work.
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 shop logo, hours, phone, and the recommended service. The Design Studio handles the rest.
Try the Design Studio →Service reminders are the highest-ROI auto repair playbook, but PostKnock also runs new-customer acquisition, oil change recall, and seasonal promos. See the full lineup on the auto repair hub.
See all auto repair campaigns →500–1,500 customers for the first run. Smaller than 500 and the per-card economics get tight against your subscription; larger than 1,500 and your front desk will struggle to handle the call queue. If you have 3,000+ past customers, split into two cohorts and stagger by 30 days.
PostKnock doesn't pull from your shop management system directly. You export the customers you want to mail. Most shops filter by 'last visit date 90+ days ago' or 'last visit date 6 months ago' depending on the service interval. Mileage-based filtering happens in your shop software before the CSV export.
A flat dollar amount off a specific service (oil change + tire rotation, brake inspection, AC service) outperforms percentage discounts and generic coupons. The specificity matters: customers respond to "$25 off your 60K service" more than they do to "15% off any service." Save percentage discounts for Wave 2 to add a fresh angle.
Yes, but with a different message. Customers 18+ months out are likely shopping elsewhere or have moved. A win-back card with a stronger offer (free oil change, $50 off any service over $200) and a personal note converts better than the standard reminder. PostKnock supports separate campaigns for each segment.
PostKnock's default is 5 business days after delivery, and you can set it from 1 to 10 per campaign. The call delay counts from the day the card is delivered, so by the time the call comes the customer has likely seen the card. Earlier feels pushy; later means they've forgotten the card.
Stop running ads to strangers. Start mailing the customers you already know are due.
Start Free1 ANA (Association of National Advertisers), Response Rate Report 2023, published February 2024.