Barclays US Fax Numbers
Barclays US publishes a fax number for its Card Services billing-disputes team. Confirm it below and fax your completed dispute form in minutes.
Last verified July 18, 2026 · Official domain: barclaycardus.com
Verified Barclays US fax numbers by department
Card Services — Billing Disputes
Submitting a completed Barclays US billing dispute form (sections A–C) with supporting documentation within 60 days of the statement mailing date.
Fax
(866) 390-3437
- Mail:
- Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802
The Barclays dispute form itself lists "Fax Number: Toll Free (866) 390-3437" and says the completed form must be mailed or faxed within 60 calendar days.
Fax to Barclays US — Card Services — Billing Disputes
Faxing to Barclays US — Card Services — Billing Disputes at (866) 390-3437
Confirm (866) 390-3437 against barclaycardus.com before sending. Banks change department fax numbers.
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Official Barclays US contact channels
Card Services billing-disputes fax
866-390-3437
Billing disputes by mail
Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802
Dispute in your account
Sign in, open Activity & Statements → Transactions, click the transaction, and select Dispute (within 60 days).
Credit bureau disputes
Card Services, P.O. Box 8803, Wilmington, DE 19899-8803
What to include when you fax Barclays US
- The completed Barclays US dispute form, sections A–C, signed
- The account number and the name on the account
- The disputed transaction's date, amount, and merchant, plus the dispute type
- Any supporting documentation (receipts, correspondence, proof of return)
- Your signature and the date — the form must be signed before faxing
How to fax Barclays US
Barclays US — the issuer of many co-branded Barclaycard credit cards through Barclays Bank Delaware — publishes a customer fax number for billing disputes. Its official dispute form (hosted on barclaycardus.com) instructs cardholders to return the completed form, sections A–C, by mail or fax within 60 calendar days of the statement mailing date, and lists "Fax Number: Toll Free (866) 390-3437."
The mailing alternative is Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802. Before you fax, complete every field in sections A–C, describe the disputed transaction and dispute type, attach any supporting documentation, and sign the form — Barclays notes it must be signed before you fax it. Keep your transmission confirmation as proof you submitted within the 60-day window.
You can also file many disputes directly in your account online: open Activity & Statements → Transactions, click the transaction, and select Dispute. Note that credit-bureau reporting disputes go to a different address — Card Services, P.O. Box 8803, Wilmington, DE 19899-8803 — not the billing-disputes fax. We publish only the billing-disputes fax that appears on Barclays' official form.
Barclays US's preferred alternatives to fax
Barclays US lets you dispute many transactions directly inside your online account, which is fastest. Fax (866-390-3437) and mail are the documented ways to submit the signed paper dispute form with supporting documents — useful when you need a dated record that you met the 60-day deadline.
Faxing financial documents to Barclays US safely
A dispute form carries your account number and signature. Fax only the completed dispute form and its supporting documents, confirm the number against the current Barclays form before sending, and keep your transmission confirmation as proof of a timely, within-60-day submission.
Barclays US fax FAQ
What is the Barclays US dispute fax number?
Barclays US Card Services accepts completed billing dispute forms by fax at 866-390-3437. The form must be signed and submitted within 60 calendar days of the statement mailing date. The mailing alternative is Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802.
How do I dispute a Barclays US credit card charge?
You can dispute many charges directly in your account (Activity & Statements → Transactions → select the transaction → Dispute), or complete Barclays' dispute form (sections A–C), sign it, and fax it to 866-390-3437 or mail it to Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802 — within 60 days.
What is the deadline to fax a Barclays dispute?
Barclays' dispute form says the completed form must be mailed or faxed within 60 calendar days of the statement mailing date. Faxing to 866-390-3437 gives you a dated confirmation that you met the deadline.
Is the Barclays billing-dispute address the same as the credit-bureau dispute address?
No. Billing disputes go to Card Services - Billing Disputes, P.O. Box 8802, Wilmington, DE 19899-8802 (fax 866-390-3437). Credit-bureau reporting disputes go to a different box: Card Services, P.O. Box 8803, Wilmington, DE 19899-8803.
Do I have to sign the Barclays dispute form before faxing?
Yes. Barclays' dispute form instructs you to sign it before mailing or faxing. Complete sections A–C, attach supporting documentation, sign and date it, then fax to 866-390-3437 and keep your confirmation.
Other bank fax guides
XenFax is an independent online fax service and is not affiliated with, endorsed by, or acting on behalf of any bank named on this page. Bank names and logos are the property of their respective owners. Banks change department fax numbers periodically — always confirm the number against the official source linked on this page before sending sensitive financial documents.