Terms of Service

Last updated: May 3, 2026

ARBITRATION NOTICE: These Terms contain a binding arbitration clause and a waiver of jury trial and class actions (Section 25). Please read it carefully. You may opt out of arbitration within 30 days of first accepting these Terms by emailing legal@postknock.com.

1. Acceptance of Terms

These Terms of Service ("Terms") govern your access to and use of PostKnock (the "Service"), operated by PostKnock ("PostKnock", "we", "us", or "our"). By creating an account, accessing the Service, or clicking "I agree" on our signup form, you agree to be bound by these Terms and our Privacy Policy. If you do not agree, do not use the Service. You must be at least 18 years old and legally able to enter into a contract. If you are using the Service on behalf of an organization, you represent that you have authority to bind that organization to these Terms.

2. Description of Service

PostKnock is a campaign management platform that enables businesses to design, send, and track physical postcards via USPS and to manage follow-up phone calls and emails through an integrated workflow. PostKnock acts as a software layer on top of third-party fulfillment services. Physical postcards are printed and mailed by our print-and-mail fulfillment provider. PostKnock uses a third-party payment processor solely for card charges and refunds; all subscription management, invoicing, promo code tracking, and trial tracking are handled internally by PostKnock.

PostKnock is a software platform and tool. Use of the Service is subject to all federal, state, and local laws and regulations that apply to you, your business, your industry, and your contacts. You are solely responsible for legal compliance, including obtaining all consents required by applicable law before uploading contacts or sending mail, calls, or emails through the Service. PostKnock does not provide legal advice; warnings or disclaimers that appear in the application are a courtesy and do not relieve you of your obligation to obtain independent legal advice for your specific use case.

3. Account Registration

You must provide accurate and complete information when creating an account. You are responsible for maintaining the security of your account credentials and for all activity that occurs under your account. You must notify us promptly of any unauthorized access. At signup, you must affirmatively agree to these Terms and our Privacy Policy; we record the timestamp and IP address of your acceptance as evidence of consent.

4. Free Account & Retained Access After Downgrade or Cancellation

PostKnock offers a free account that allows you to create single-wave postcard campaigns, import contacts, customize templates, and preview postcards at no cost and without a subscription. There is no time limit on the free account. Sending postcards from a free account requires a valid payment method and a funded postcard wallet.

You do not lose access to the Service if you cancel, downgrade, fail to renew, or let a promo Pro trial expire. Your account continues on the Free tier with the following guarantees:

The only scenario in which your account and data are permanently removed is if you explicitly request account deletion or if we terminate your account under Section 19 (Termination) for a Terms violation.

5. Pro Subscription & Billing

The Pro plan is available at $99 per month or $799 per year. Unless you are subscribing during an active Free Pro Trial (see Section 7), your Pro subscription begins immediately when you select a plan and provide a valid payment method, and your first subscription charge is processed on that date. Your subscription will automatically renew at the end of each billing period at the then-current rate until you cancel. Per-piece postcard charges (printing + USPS First-Class postage) are pre-paid via your PostKnock wallet and are deducted before postcards are submitted for printing. Per-piece rates vary by size and plan (see our pricing page for current rates). Prices may change with 30 days' notice.

6. 30-Day Money-Back Guarantee (Annual Plans Only, First-Time Subscribers Only)

If you subscribe to the Pro annual plan ($799/yr) and are unsatisfied for any reason within 30 days of your first subscription charge, you may request a full refund of the annual subscription fee by contacting support@postknock.com or from Account Settings. This guarantee does not apply to:

After the 30-day guarantee period (for eligible subscriptions), no refunds are issued for subscription fees. Per-piece postcard costs are never refundable — postcards already printed and mailed cannot be recalled.

7. 30-Day Free Pro Trial (Promo Codes)

Certain promo codes grant 30 days of free Pro access ("Free Pro Trial"). During a Free Pro Trial you are not charged for the subscription.

Subscribing during an active trial. You may subscribe to Pro at any time during your trial. When you do, you are not charged on that day. Your first subscription charge is deferred to the day your 30-day trial ends, and your card will be charged the monthly or annual rate you selected on that date. You may cancel at any time before the trial ends from Account Settings to prevent that charge.

Letting the trial expire without subscribing. If you do not subscribe before the trial ends, your account is automatically downgraded to the Free tier at the end of the 30-day trial. Any Pro-only campaigns are paused in place (see Section 4). You retain full Free-tier access and can resubscribe at any time.

Courtesy reminder. We send a reminder email approximately 3 days before your trial ends so you can cancel or update your payment method if you choose.

No money-back guarantee on trial-derived subscriptions. Because the Free Pro Trial already served as your 30-day evaluation window, the 30-day money-back guarantee in Section 6 does not apply to any subscription by an account that has received a Free Pro Trial. This applies whether you subscribe during the trial, on the day the trial ends, or at any later date.

8. Promo Codes & Wallet Credits

Promo codes may grant wallet credits, Pro trial days, or both. Codes may be redeemed at signup (via the signup form) or at any time from the Billing page. If you enter an invalid code at signup, signup is not blocked — your account is still created and you can try a different code from the Billing page later. One promo code per account. Wallet credits apply only to per-piece postcard charges, have no cash value, are non-transferable, are not redeemable for cash, and are forfeited on account deletion. PostKnock reserves the right to revoke credits and close accounts if promotional offers are used fraudulently or abused.

9. Postcard Wallet & Auto-Reload

Your postcard wallet is a prepaid balance used to pay for per-piece postcard charges. You fund it manually or via optional auto-reload (off by default). If an auto-reload charge fails, we pause campaigns and notify you by email. Wallet balances, once funded, are non-refundable. If you cancel your subscription, your wallet balance is preserved and may be used for future per-piece charges or forfeited if the account is deleted.

10. Customer Data & Content Responsibility

You retain all rights in the content you upload to the Service, including your contact lists, postcard copy, imagery, and any other materials (collectively, "Customer Data"). You grant PostKnock (and our service providers, acting on our behalf) a non-exclusive, limited license to use Customer Data solely to provide the Service you have requested (including printing, mailing, address verification, email delivery, and related operations). You represent and warrant that you have all necessary rights, releases, and consents to upload Customer Data and to authorize the uses described in these Terms. You are responsible for obtaining any opt-in consent required by applicable law before uploading contact information.

11. Print & Proof Responsibility — No Refund for Approved-Proof Errors

You are solely responsible for proofing your design before approval. Before you approve a proof or launch a campaign, you must verify that all text is correct and legible, the return address is accurate, QR codes and URLs resolve correctly, the design fits within the safe zone (no bleed or trim issues), all imagery you use is properly licensed, and the offer, disclaimer, and any regulated claims comply with applicable law.

PostKnock does NOT refund printing errors, typos, or design mistakes that match the proof you approved or were shown before launch. When you launch a campaign, you are deemed to have approved the proof shown to you, and that proof is the specification we and our fulfillment provider fulfill. If the printed postcard matches the approved proof, the charge is non-refundable. If a postcard is printed with a defect that does not match the approved proof (a genuine print/render error), you must notify us within 30 days of the print date to qualify for a credit or reimbursement at our reasonable discretion.

12. Fulfillment & Mail Delivery

PostKnock uses a third-party print-and-mail fulfillment provider to produce and mail your postcards. By using the Service you acknowledge and agree that:

13. Acceptable Use & Legal Compliance

You agree not to use the Service to:

14. Do Not Contact (DNC) Compliance

You are responsible for maintaining your own Do Not Contact (DNC) and suppression lists and for ensuring compliance with federal, state, and local telemarketing and mail regulations. PostKnock provides DNC management tools and accepts DNC signals that recipients submit via tracked URLs, but compliance remains your responsibility.

15. Customer Consent & State/Local Privacy Compliance

You must have all required consent before uploading or contacting any individual through the Service. You represent and warrant that, before uploading a contact or sending any postcard, call, or email through PostKnock, you have obtained every consent, opt-in, authorization, and right required by applicable federal, state, and local law for that contact and that intended use — including under privacy laws such as the California Consumer Privacy Act / California Privacy Rights Act (CCPA/CPRA), Virginia VCDPA, Colorado CPA, Connecticut CTDPA, Texas DPDPA, and other state consumer-privacy statutes; under telemarketing laws such as the TCPA and state mini-TCPA statutes; and under wiretap, recording, and "CIPA-style" statutes. PostKnock does not verify consent on your behalf. If your contacts are residents of a jurisdiction with consent, opt-in, or disclosure requirements, you — not PostKnock — are responsible for satisfying those requirements and for any liability arising from your failure to do so. You agree to defend, indemnify, and hold PostKnock harmless from any claim, fine, penalty, or damage arising from your violation of any privacy, consumer-protection, telemarketing, or recording law.

16. Permitted Data & Healthcare Use

PostKnock is widely used by healthcare practices — dental, optometry, chiropractic, med spa, veterinary, and similar — for routine direct-mail and follow-up marketing. The information needed to run a typical PostKnock campaign is basic contact data, not Protected Health Information (PHI), and most healthcare-practice marketing falls within HIPAA's permitted-marketing and treatment/healthcare-operations communication exceptions (45 CFR 164.501 / 164.508), which generally do not require a Business Associate Agreement.

Permitted data. You may upload name, mailing address, phone number, email address, and non-sensitive identifiers you have assigned (customer ID, account number). This is all PostKnock needs to print a postcard, route a follow-up call, or send a follow-up email.

Please keep PHI and other sensitive data out of the Service. To keep your use of PostKnock simple and compliant, do not upload to any field of the Service — including contact records, list names, tags, campaign metadata, design content, or call scripts:

PostKnock does not act as a Business Associate. Because the Service is not designed to receive or store PHI, PostKnock does not enter into Business Associate Agreements. As long as you keep the data you upload limited to permitted contact information, you can use the Service without needing a BAA — that is the model contemplated by HIPAA's marketing and treatment/healthcare-operations exceptions. If your intended use does require a Business Associate (for example, communications that include treatment details for a specific patient), PostKnock is not the right tool for that use case.

You represent that you will not upload PHI or other prohibited data to the Service and that your use fits within an applicable HIPAA exception (or that HIPAA does not apply to you). PostKnock does not scan, scrub, or monitor uploaded content. If we become aware of prohibited data on your account, we may remove the offending data and, in serious or repeated cases, suspend or terminate the account. You agree to defend, indemnify, and hold PostKnock harmless from any claim, fine, penalty, or damage arising from your upload or use of prohibited data through the Service.

17. Tracking, Analytics & Recipient Disclosure

The Service uses tracking technologies, including unique QR codes, tracked URLs (e.g., postk.co redirects), and scan analytics that capture device type, browser, IP address, timestamp, and approximate location associated with each scan or click. PostKnock provides per-contact engagement reporting to you so you can measure campaign performance.

You are responsible for ensuring your privacy policy and any consumer notices accurately disclose the use of tracking technologies in your direct mail and follow-up communications, and for ensuring you have all rights and permissions necessary to send mail to and track engagement from your contacts under applicable law (including state wiretap, "CIPA-style," and consumer-protection statutes). PostKnock displays its own privacy notice on tracking redirect pages, but PostKnock does not represent that this notice satisfies your disclosure obligations to your contacts.

18. Phone Follow-Up & TCPA Compliance

The Service includes phone follow-up workflows (call queue, scripts, status tracking) that enable you to call contacts you have uploaded. You are solely responsible for compliance with the Telephone Consumer Protection Act (TCPA), state mini-TCPA statutes, the federal and state Do-Not-Call Registries, calling-time-of-day restrictions, and all other applicable telemarketing, call-recording, and consumer-protection laws. This includes obtaining and maintaining records of any required prior express consent (or prior express written consent for autodialed marketing calls or texts to mobile numbers) before calling or texting any contact; scrubbing your call lists against DNC registries at the cadence required by law; honoring revocation of consent and internal company-specific DNC requests; and complying with all state-level call-recording and two-party-consent statutes if you choose to record any call.

PostKnock does not provide a dialer, does not auto-dial, and does not transmit pre-recorded messages — calls are placed manually by your staff using contact information you provide. You represent and warrant that you have the legal right to call each contact you upload for the purposes you intend.

19. Sub-Processors & Data Processing Addendum

The Service relies on a small set of sub-processors, including providers for print-and-mail fulfillment, payment processing, transactional email delivery, and product analytics. A current list of sub-processors is available on request. We provide a Data Processing Addendum (DPA) on request to customers subject to GDPR, CCPA/CPRA, or similar regimes.

20. Intellectual Property

PostKnock and its original content, features, and functionality — including the software, templates, design shells, and documentation — are owned by PostKnock or its licensors and are protected by copyright, trademark, and other intellectual property laws. You are granted a limited, non-exclusive, non-transferable license to use the Service for your business purposes. You retain ownership of your Customer Data.

21. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED OR ERROR-FREE, THAT POSTCARDS WILL BE DELIVERED BY ANY SPECIFIC DATE, OR THAT RESULTS WILL MEET YOUR EXPECTATIONS. DELIVERY IS SUBJECT TO USPS PROCESSING TIMES, WHICH ARE OUTSIDE OUR CONTROL.

22. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, POSTKNOCK WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING LOST PROFITS, LOST DATA, BUSINESS INTERRUPTION, OR REPUTATIONAL HARM, EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. OUR TOTAL AGGREGATE LIABILITY ARISING FROM OR RELATED TO THE SERVICE WILL NOT EXCEED THE GREATER OF (A) THE AMOUNTS YOU PAID US IN THE TWELVE (12) MONTHS PRECEDING THE CLAIM, OR (B) ONE HUNDRED U.S. DOLLARS ($100). THESE LIMITATIONS APPLY REGARDLESS OF THE LEGAL THEORY (CONTRACT, TORT, OR OTHERWISE).

23. Indemnification

You agree to defend, indemnify, and hold harmless PostKnock and its officers, directors, employees, and agents from any claims, liabilities, damages, and costs (including reasonable attorneys' fees) arising from: (a) your use of the Service; (b) your violation of these Terms; (c) your Customer Data or content; (d) your violation of any third-party right (including intellectual property, privacy, and publicity rights); (e) your violation of any applicable law or regulation, including HIPAA, CCPA/CPRA and other state privacy laws, TCPA and state telemarketing statutes, and state wiretap or "CIPA-style" laws; and (f) any claim brought by a recipient of mail, calls, emails, or tracking communications you initiated through the Service.

24. Cancellation, Downgrade & Termination

Voluntary cancellation or downgrade. You may cancel your subscription at any time from Account Settings. Cancellation takes effect at the end of the current billing period. Your account is not deleted — you transition to the Free tier and retain all the access described in Section 4 (Free Account & Retained Access After Downgrade or Cancellation), including preserved campaigns, contacts, designs, and wallet balance. You can resubscribe at any time with no loss of data.

Involuntary downgrade (e.g., a failed subscription renewal after the grace period, or expiration of a Free Pro Trial without subscribing) results in the same Free-tier retained access — Pro-only features are paused, Free-tier functionality continues. We notify you by email before and at the time of any involuntary downgrade.

Termination by PostKnock for cause. We may suspend or terminate your account for violation of these Terms, for non-payment that remains unresolved after notice, or to protect the Service or other users. Upon termination for cause, your right to use the Service ceases immediately. Wallet balances are non-refundable.

Account deletion. If you explicitly request account deletion (by emailing support@postknock.com), your account and associated Customer Data are removed within 45 days, except for records we are required to retain by law (tax, fraud prevention, legal hold) or that exist solely in standard backup media subject to routine rotation. Account deletion is not automatic — cancelling or downgrading alone does not delete your account or data.

25. Binding Arbitration & Class-Action Waiver

Any dispute arising from or relating to your use of the Service that is not resolved informally within 30 days of written notice to support@postknock.com will be submitted to binding individual arbitration administered by JAMS in accordance with its then-current Rules of Practice and Procedure. Arbitration will be held in the State of New Mexico. The Federal Arbitration Act governs the interpretation and enforcement of this clause. The arbitrator's decision is final and binding and may be entered as a judgment in any court of competent jurisdiction. Each party will bear its own costs and attorneys' fees; arbitrator fees are shared equally except as otherwise required by law.

YOU WAIVE ANY RIGHT TO HAVE YOUR CASE DECIDED BY A JURY. YOU MAY ONLY RESOLVE DISPUTES WITH US ON AN INDIVIDUAL BASIS AND MAY NOT BRING A CLAIM AS A PLAINTIFF OR CLASS MEMBER IN A CLASS, CONSOLIDATED, OR REPRESENTATIVE ACTION. CLASS ARBITRATIONS, CLASS ACTIONS, PRIVATE ATTORNEY GENERAL ACTIONS, AND CONSOLIDATION WITH OTHER ARBITRATIONS ARE NOT ALLOWED.

30-Day Opt-Out. You may opt out of this arbitration clause by sending written notice to legal@postknock.com within 30 days of first accepting these Terms. Opting out will not affect any other provision of these Terms.

26. Governing Law & Venue

These Terms are governed by and construed in accordance with the laws of the State of New Mexico (PostKnock's state of registration), without regard to its conflict-of-law rules. Subject to Section 25 (Arbitration), the parties consent to the exclusive jurisdiction and venue of the state and federal courts located in New Mexico for any matter not subject to arbitration.

27. Changes to Terms

We may modify these Terms from time to time. Material changes will be communicated by email or in-app notification at least 30 days in advance. Your continued use of the Service after the effective date of a change constitutes acceptance of the updated Terms. The "Last updated" date at the top of this page reflects the current version.

28. Service Geography, Currency & Payment Methods

PostKnock is a U.S. direct-mail service. The Service is designed for businesses that market to U.S.-based recipients via U.S. mail. Specifically:

If your intended use does not fit within this scope (for example, you need to deliver mail outside the U.S., bill in a non-USD currency, or pay by a non-card method), PostKnock is not the right tool for your use case at this time.

29. Contact

Questions about these Terms? Contact us at hello@postknock.com (general), support@postknock.com (billing and refunds), or legal@postknock.com (legal notices and arbitration opt-out).