Nationstar Mortgage Customer Service Number — Practical, Expert Guide

Overview: Nationstar vs. Mr. Cooper and the primary contact

Nationstar Mortgage rebranded to Mr. Cooper in October 2017; nearly all customer-facing operations, websites and phone numbers now operate under the Mr. Cooper name. If you held a mortgage serviced by Nationstar, your loan file and servicing procedures were transferred to Mr. Cooper and the most reliable single phone number for servicing questions remains 1-888-480-2432. The corporate website to verify account details, upload documents or start a live chat is https://www.mrcooper.com.

Using the current company name matters when searching for official correspondence and portals: physical headquarters and corporate filings list Mr. Cooper as the servicer. The corporate headquarters address most commonly listed in filings and filings-related correspondence is 8950 Cypress Waters Blvd, Coppell, TX 75019. Always confirm any payment or secure-login URL at mrcooper.com rather than responding to unsolicited calls or emails that claim to be “Nationstar.”

Main customer service channels, hours and immediate actions

Primary phone (servicing/customer inquiries): 1-888-480-2432. This number provides access to both automated payment options (available 24/7) and live-agent servicing for questions about billing, escrow, payoff quotes and loan modifications. For urgent payment or automated-pay options you can call any time; for complex loss-mitigation conversations or underwriting you will typically need a weekday live agent.

If you need written records, start transactions through the secure channels at mrcooper.com (log in under “Customer Sign In”) or the Mr. Cooper mobile app (iOS/Android). For formal written complaints or mailed documents, use the contact and upload locations shown inside your online account or on official billing statements — these specify the correct P.O. Box or special handling address for your loan. If a mailed address is required and not on your statement, call 1-888-480-2432 and request the payments/mail routing for your loan number, then confirm in writing.

What to have ready when you call (fast checklist)

• Loan number (the 10–12 digit account number shown on your mortgage statement) or property address; if you don’t have the loan number, give the full property address and spelling.
• Borrower name exactly as on the loan and the last 4 digits of your Social Security Number for verification; one or more phone numbers and your email on file.
• Recent statement or payoff quote (date and amount), current monthly payment amount, escrow balance questions, or documentation for hardship (pay stubs, unemployment letter, COVID/medical docs) when discussing forbearance or modification.

Payments: methods, timing, and fees

Mr. Cooper accepts mortgage payments through multiple channels: online payments at mrcooper.com (one-time or recurring ACH), automated phone payments via 1-888-480-2432, mobile app payments, mailed checks to the address on your statement, and expedited payments through bank-issued wire transfers where instructions are provided in the online portal. ACH/online payments typically post same business day if made before the cutoff shown in your account; otherwise they post the next business day.

Expect possible convenience fees for credit-card payments (if allowed on your loan type) and for third-party expedited services. ACH payments commonly have no fee; credit-card processors often charge 2–3% or a flat fee (verify at time of payment). Confirm cut-off times and fees in your online account or by asking the agent, and always retain the confirmation number when you complete a payment.

Loss mitigation, forbearance, and escalation paths

If you need a temporary payment suspension (forbearance) or modification, call 1-888-480-2432 and request loss-mitigation options. Typical industry practice is an initial forbearance of 3 months with possible extensions depending on documentation and underwriting; Mr. Cooper evaluates hardship documentation (income/expenses, unemployment or medical proof) and will provide specific timelines and paperwork. Always ask for a written acknowledgement and a target decision date — servicers often acknowledge receipt within 5 business days and issue decisions within 30–45 days, though timelines can vary by case.

If you are unsatisfied with the response from customer service, escalate to the company’s executive customer relations or dispute team via the secure messaging center of your online account and request a written escalation number. For unresolved complaints you may file with the Consumer Financial Protection Bureau (CFPB) at https://www.consumerfinance.gov/complaint or by phone at 855-411-2372. You can also obtain free HUD-certified housing counseling via the Department of Housing and Urban Development hotline at 800-569-4287 for independent guidance before agreeing to a plan.

Fraud prevention, documentation, and practical tips

Never send payments to individuals or third-party accounts outside the channels shown on your official statement or mrcooper.com. Red flags include callers demanding immediate payment via gift cards, wire to an unknown account, or insisting you change your online account email/password per their instructions. When in doubt, end the call and dial 1-888-480-2432 from a number you trust and confirm whether the outreach was legitimate.

Document every interaction: date/time of call, agent name or ID, summary of the conversation, reference or ticket numbers, and follow-up deadlines. If you submit hardship or financial documents, upload them through the secure upload in your online account so there is a timestamped receipt; keep local copies for your records. This creates a clear audit trail if you later need to escalate or file a regulatory complaint.