SHORT ANSWER
Square’s Payment Terms do not name peptides, research chemicals, or health claims. The unsupported-industries list reaches a peptide storefront through three broader entries: illegal goods, internet-order pharmacies, and “high-risk products and services.” Square also reserves the right to request supplier invoices at any time and, in its General Terms, to terminate access “at any time, for any reason.”
This material is general educational information as of the “last reviewed” date. It is not legal advice and may not reflect later developments or facts specific to your business. Links are provided so readers can inspect the primary or official sources.
01 / ONE ACCOUNT, ONE POLICY
Square is the processor, the reader, and the online checkout
Square describes itself in its Payment Terms as “a payment facilitator that allows you to accept Cards.” The same Square Account runs the card reader at a counter or event, the online checkout, invoices, and payment links. There is no separate gateway with its own rules to install; the Payment Terms and the General Terms govern every channel.
That matters for a peptide seller because it removes a common assumption. A storefront that takes cards through a different gateway online but swipes a Square reader at a trade show is still presenting the same products to Square, under Square’s policy.
Both documents carry dates. The Payment Terms we read are marked “Last updated: July 30, 2026.” The General Terms are marked “Last updated June 1, 2026.” Both were read on September 3, 2026.
02 / THE UNSUPPORTED LIST
What the list says, and what it does not
Section 3 of the Payment Terms, “Unsupported Industries,” opens with the reason: Square “can’t process payments for certain types of businesses” because of “limitations from the card brands, our partners, or the law,” and adds that “a few types we won’t support for other business reasons.”
The numbered list that follows has thirty-one entries. None of them says peptide, research chemical, pharmaceutical product, supplement, or health claim. Three entries can still reach a peptide storefront:
- Entry (1): “any illegal activity or goods.” Whether a given product is an unapproved drug is a question FDA answers from intended use, not from the label; see the related guide on research-use-only disclaimers.
- Entry (8): “internet/mail order/telephone order pharmacies or pharmacy referral services,” with the qualifier that fulfillment of medication happens without a physical visit.
- Entry (20): “high-risk products and services, including telemarketing sales.” The phrase is not defined in the section.
A category that is not named can still fall under a general entry, and Square’s partners can reach a different conclusion than the list alone suggests. The Payment Terms say the bank partners “or Square may decide you can’t use our services.”
03 / THE CONNECTED-BUSINESS CLAUSE
The list also reaches businesses you are linked to
The same section closes with a clause that is easy to miss. A seller may not use the Payment Services if “connected in any way to any other business” that conducts illegal activities or sells illegal goods, “even if you do not use the Payment Services in relation to that specific business.” Square gives cannabis as its example.
For an operator who runs a peptide storefront alongside a second business on Square, this is the clause that ties them together. The review does not stop at the account that processes the peptide sales.
04 / HOW SQUARE DESCRIBES REVIEW
Verification at signup, and again whenever Square asks
Square’s identity-verification section states that it reviews signup information, shares the application with its bank partners, and that “Square may periodically obtain additional reports to determine whether you continue to meet the requirements.” Approval at signup is described as a starting point, not a settled status.
Section 9, “Requests for Additional Information and Inspection,” is the mechanism most relevant to a product-category question. Square “may request additional information from you at any time,” and its own examples are “invoices from your suppliers,” a government ID, and a business license. Square “may also ask for permission to inspect your business location.” The consequence is stated plainly: refuse, and the account “may be suspended or terminated.”
The General Terms set the outer boundary. Square “can terminate or deny you access to our services at any time, for any reason,” and section 12 repeats that it may “suspend or terminate your Square Account” at any time, “including a violation of the Terms.” Square commits to “reasonable steps to notify you” by email or at the next login.
Nothing we read describes how Square detects a category after onboarding, how often it reviews, or what evidence it weighs. The terms grant the right to review; they do not publish the method.
05 / THE IN-PERSON ANGLE
A reader at an event is the same account
Square’s hardware makes it a common choice for conferences, gym pop-ups, and clinic-adjacent events. The Payment Terms do not distinguish in-person sales from online sales for the unsupported-industries list, and the supplier-invoice request in section 9 applies to the account, not to a channel.
A seller who keeps the peptide catalog off the Square online store but sells the same vials in person has not moved outside the policy. Square’s own description of the review process starts with what the business is, established through documents the seller supplies, rather than with which checkout a sale went through.
06 / WHAT TO REVIEW FIRST
Read your storefront before you read another processor’s list
Square’s list is short on category names and long on general clauses, so the question it raises is the one every provider raises: what does the storefront say the products are for? Product names, descriptions, imagery, bundled supplies, and reviews are what a reviewer reads, and a research-use-only line does not change that reading.
Before applying to Square or anyone else, work through the same surfaces FDA cites in its warning letters and record what was found and what was changed. The related guide on research-use-only disclaimers walks through each surface.
- Product names and slugs that name an outcome or an approved drug
- Descriptions that describe effects in people
- Bacteriostatic water, syringes, or kits sold alongside
- Reviews, testimonials, and before-and-after imagery
- Supplier documentation you could produce if Square asked under section 9
QUESTIONS
Related questions
Does Square’s list ban peptides by name?
No. The thirty-one entries in section 3 of the Payment Terms do not mention peptides, research chemicals, or health claims. The entries that can reach a peptide storefront are illegal goods, internet-order pharmacies, and “high-risk products and services.”
If my online store uses another gateway, can I use a Square reader at events?
The reader runs on the same Square Account and the same Payment Terms as everything else. Square’s unsupported-industries list and its right to request supplier invoices apply to the business, not to one sales channel.
Can Square close an account it already approved?
Its General Terms say it can terminate access “at any time, for any reason,” and its Payment Terms say it may periodically obtain reports to decide whether an account still meets requirements. Approval at signup is not described as permanent.
Does RUO Clear know whether Square would accept my store?
No. A scan reports what the storefront says and which policy text it maps to. Square and its bank partners make their own decision, and nothing on this page predicts it.
SOURCES
Sources cited
Each source is listed with its class so government authority, agency guidance, enforcement examples, and private policy are never blended into one rule.
Section 3 unsupported industries and the connected-business clause; identity verification; section 9 requests for information and inspection.
Termination and suspension at any time for any reason; section 12 modification and termination; notice by email or at next login.
Why whether a product is an unapproved drug turns on the whole presentation, which is the question Square’s “illegal goods” entry ultimately points to.