An AMZN Mktp CA charge on your bank or credit card statement is a purchase made through a third-party seller on Amazon.ca, Amazon’s Canadian marketplace. The charge shows up under this descriptor whether you shopped on the Canadian site yourself or a seller routed your order through it. Before assuming fraud, it’s worth checking a few common explanations, because most of these charges trace back to a forgotten subscription, a household member’s order, or a seller you didn’t realize was based in Canada.
What the Descriptor Actually Says
Each part of the code carries specific information. AMZN is Amazon’s standard billing abbreviation. MKTP is short for “Marketplace,” which means the item was sold by an independent third-party seller using Amazon’s platform, not by Amazon’s own retail arm. CA identifies the Canadian storefront, Amazon.ca.1Amazon. Unknown Charges – Amazon.ca Your statement may also show a trailing alphanumeric string such as *M12345678, which is a transaction reference Amazon customer service can use to look up the order.
Seeing CA doesn’t necessarily mean you visited Amazon.ca. A seller might fulfill your order from Canadian inventory, or a listing might route through Amazon’s Canadian payment gateway for logistical reasons. The reliable takeaway is that MKTP signals a third-party seller, not Amazon itself.
Why You Might Not Recognize It
Amazon itself flags the most common explanation first: someone else with access to your card placed the order. That includes family members, roommates, or anyone who uses a shared Amazon Household account or a device where your payment method is saved.2Amazon. Identify an Amazon Charge Their purchases show up under Amazon’s descriptor rather than the seller’s name.
Recurring subscriptions are another frequent source. Amazon’s Subscribe & Save program reorders products automatically on the schedule you originally set, and months can go by before a charge catches your eye. A subscription filled by a Canadian seller produces exactly this descriptor. You can review and cancel active subscriptions in the Subscribe & Save management page in your account settings.3Amazon. Cancel Your Subscribe and Save Subscription Also worth checking: any secondary credit or debit cards tied to the same bank account, since a charge on a card you rarely use still lands on the same statement.
How to Match the Charge to an Order
Log into your Amazon account and open the Returns and Orders page. Filter by the date range around the charge, and give yourself a one- to three-day buffer, because bank posting dates often lag the actual purchase. Match the dollar amount, keeping in mind that taxes, shipping, and currency conversion can shift the final number from what the product page showed.
If nothing matches on Amazon.com, log into Amazon.ca separately. Orders placed through the Canadian site don’t always appear in your U.S. order history. Use the same email and password. You can also cross-reference through your email inbox by searching for “Amazon.ca” or the exact charge amount. The confirmation email will list the seller of record, which usually explains why the marketplace descriptor showed up in place of a brand name you’d recognize.
Why the Total May Be Higher Than the Product Price
Buying through Amazon.ca crosses an international border, and that adds costs beyond the sticker price. Most credit card issuers charge a foreign transaction fee of roughly 3 percent of the purchase amount. Capital One and Discover are the notable issuers that waive the fee entirely, so check your cardholder agreement if you’re not sure where yours stands.4General Services Administration. GSA SmartPay Smart Bulletin No. 007
The larger surprise in 2026 is import duties. The U.S. government suspended the duty-free de minimis exemption that used to let shipments valued under $800 enter the country without tariffs. As of February 2026, all shipments are subject to applicable duties, taxes, and fees regardless of value.5The White House. Continuing the Suspension of Duty-Free De Minimis Treatment for All Countries If you ordered physical goods from a Canadian seller, expect potential duty charges on top of the product price. These may appear as a separate charge from the carrier or be collected at delivery, so the Amazon.ca charge on your statement might be only part of what you end up paying.
Disputing the Charge With Amazon
If you’ve checked both Amazon.com and Amazon.ca, asked household members, and still can’t place the charge, start with Amazon customer service. For marketplace purchases, the A-to-z Guarantee covers items that never arrived, arrived damaged, or were materially different from the listing.6Amazon. Amazon A-to-z Guarantee Amazon asks you to contact the seller first and wait at least 48 hours for a response before filing a claim through the help center.
The A-to-z Guarantee is built for orders that went wrong, not for charges you don’t recognize at all. If you think someone used your card without permission, skip the seller step and go straight to Amazon customer service or your bank.
Disputing With Your Bank
Your protections and deadlines depend on whether the charge hit a credit card or a debit card. The difference is significant.
Credit Card Charges
Federal law caps your liability for unauthorized credit card charges at $50, and most major issuers waive even that with zero-liability policies.7Office of the Law Revision Counsel. 15 USC 1643 – Liability of Holder of Credit Card To preserve your dispute rights, you must notify your card issuer in writing within 60 days of the date the statement containing the charge was sent to you.8eCFR. 12 CFR 1026.13 – Billing Error Resolution Miss that window and you lose the federal right to dispute. This is the deadline people blow most often on charges they didn’t notice right away.
Debit Card Charges
Debit card protections under Regulation E are weaker and much more time-sensitive. Liability escalates by tier:9Consumer Financial Protection Bureau. 12 CFR 1005.6 – Liability of Consumer for Unauthorized Transfers
- Report within 2 business days of learning about the charge: liability is capped at $50.
- Report after 2 business days but within 60 days of the statement being sent: liability jumps to $500.
- Report after 60 days: you can be responsible for the entire amount, with no cap.
Once you report the charge, the bank must investigate. For international transactions like an Amazon.ca purchase, the investigation window can stretch to 90 days, and the bank typically issues a provisional credit while it works.10eCFR. 12 CFR 1005.11 – Procedures for Resolving Errors If the bank ultimately concludes the charge was authorized, it can reverse that credit after giving you notice.