866-431-3875 is listed as the public telephone number for MATPSC WSU, office code C12, in a Social Security Administration workload support unit directory. That official record connects the number with an agency unit. Readers should treat an incoming caller as requiring independent verification and check unexpected requests through the agency’s current contact routes.
Social Security may call about a recent application, a record update, or a callback that the person requested. Its published guidance also rejects arrest threats, suspended Social Security numbers, and demands for immediate payment. Someone receiving those demands can end the conversation and independently contact the agency to check a real benefits issue without following the caller’s directions.
Social Security’s listing for 866-431-3875
The agency’s workload support unit directory places 866-431-3875 in its public phone column and identifies the associated unit and office code. The listing is evidence of that documented administrative use. For current assistance, open Social Security’s own contact page directly instead of treating the number displayed during a surprising call as proof of the speaker’s identity.
An existing benefits matter can provide a reason for genuine agency contact. Social Security says it generally calls people who recently applied, receive payments and need to update their record, or specifically requested a call. The recipient can compare the conversation with that context, then use official support routes when the request goes beyond what was expected.
How to check who called about benefits
Checking who called involves more than matching digits with an agency directory. Social Security warns that criminals spoof government numbers and use actual employees’ names. The phone lookup guide explains why an official number association and the identity of an incoming caller need separate checks. Pressure to act immediately is a reason to pause before sharing information.
A claim that this workload support unit must suspend a Social Security number conflicts with the agency’s scam guidance. Arrest threats and immediate-payment demands are also warning signs. End the conversation and check any benefits matter through Social Security’s official website. A directory association with MATPSC does not make those threats consistent with the agency’s published practices for contacting recipients.
Barcode payment demands and scam calls
A September 28, 2026 inspector general alert describes callers sending a barcode or QR code and directing recipients to load money onto it at a retail store. The agency says Social Security and other government agencies do not demand immediate payment that way. A code sent by a supposed official should not become a shopping or payment instruction.
Check requests displaying 866-431-3875
- Reject threats to suspend a Social Security number.
- Do not load retail payment barcodes for an alleged official.
- Do not transfer money to protect it.
- Verify through an independently selected agency contact.
If a call displaying 866-431-3875 includes a payment demand, check it against the agency’s published rules. Social Security says it does not require cash, gift cards, prepaid debit cards, internet currency, or wire transfers. It also rejects requests for banking or personal information to provide a cost of living adjustment. Hang up rather than follow those instructions.
The same barcode warning advises never trusting a call transfer to an alleged agency representative. Hang up and call the agency directly using a number from its official website. This prevents a caller from controlling the verification process by introducing another voice who appears to confirm the story but remains part of the same deceptive interaction.
What to do after sharing information or money
If a caller posing as MATPSC obtained a Social Security number, use the FTC’s IdentityTheft.gov response steps for that exposure. Replace disclosed passwords and matching passwords elsewhere through genuine services. The reporting guide can record the benefits story, claimed employee, and requested information. Securing affected accounts remains separate from reporting that the caller impersonated an agency workload support unit.
After loading a retail barcode or sending money to a supposed Social Security representative, contact the relevant bank, card company, or payment service immediately. FTC guidance recommends asking whether it can return the payment. Keep the barcode and receipt with the call details. The recovery scams guide explains later fee pitches by people promising to retrieve the alleged benefits-related payment.
Where to report agency impersonation
Submit a call impersonating Social Security’s workload support unit through the SSA inspector general’s reporting page. Identify the displayed number, claimed MATPSC connection, threats, callback details, and any barcode or payment request. The FTC also takes reports at ReportFraud.ftc.gov. Preserve the message even when no money moved, keeping the directory association distinct from what the incoming caller claimed or demanded.
The official directory entry for 866-431-3875 establishes an association with Social Security’s MATPSC workload support unit. Incoming requests still need to fit the agency’s published practices and the recipient’s own benefits dealings. Independent contact through Social Security’s official website provides a way to pursue legitimate assistance while refusing urgent payment demands or instructions to move money for protection.
- Complaints in the period
- 2
- Marked as robocall or recorded message
- 100%
- Most reported topic
- Calls pretending to be government, businesses, or family and friends
- Most reports from
- Virginia
Method: counts of complaints in the FTC's Do Not Call Reported Calls Data that list this number, filed between October 8, 2026 and November 3, 2026. Callers can fake a caller ID, so a complaint names the number shown, not necessarily the business that owns it. FTC data set.
Questions and answers
Which agency record identifies this number?
Social Security’s workload support unit directory lists the number as the public telephone contact for MATPSC WSU, office code C12. That establishes a documented agency association. It does not authenticate a caller displaying the number or justify an unexpected payment demand.
Could a legitimate Social Security call involve MATPSC WSU?
Social Security lists 866-431-3875 for MATPSC WSU, office C12, and says it sometimes calls applicants or beneficiaries about their records. That context does not authenticate an unexpected caller. Verify through the agency directly before providing information, particularly when a supposed benefits update becomes a payment demand.
What if a caller displaying 866-431-3875 threatens to suspend an SSN?
Social Security says it never suspends a Social Security number. End a call making that threat, even when its display resembles the workload support unit’s listed contact. Do not send money or disclose personal details, and report the impersonation to the agency’s inspector general.
Can a Social Security payment demand arrive as a barcode?
The Social Security inspector general’s September 28, 2026 alert warns about callers sending barcodes or QR codes for recipients to load with money at stores. Social Security and other government agencies do not demand immediate payment through that method.
Is a transfer to another official enough to verify a call?
The Social Security inspector general advises against trusting a call transfer as verification. Hang up and contact the agency directly through a number on its official website. A different voice within the same conversation does not provide an independent check.
How should a suspicious call displaying the MATPSC WSU number be reported?
Report suspected Social Security impersonation through the inspector general’s official reporting page. Preserve the displayed 866-431-3875, any separate callback number, messages, and payment instructions. The FTC also collects fraud reports; describe the threatening or deceptive conduct rather than treating the directory listing as proof of caller identity.
Sources
- Workload Support Unit Direct Phone Numbers · Social Security Administration
- Contact Social Security · Social Security Administration
- Calls from someone claiming to be a Social Security employee · Social Security Administration
- Protect Yourself from Social Security Scams · Social Security Administration
- Think Before You Scan: Beware of QR Code Phishing · SSA Office of the Inspector General
- Protect Your Social Security Number · SSA Office of the Inspector General
- Report Fraud · SSA Office of the Inspector General
- What To Do if You Were Scammed · Federal Trade Commission