Unisource Customer Service Number — Practical, Verified Guidance for Finding the Right Contact

Overview: why “Unisource” needs precise identification

“Unisource” is a trade name used by several independent companies across industries — from paper and packaging distribution to regional utilities — and each operates its own customer service organization, phone numbers, billing portals and escalation paths. Because of that brand overlap, a single phone number does not exist that will reliably connect you to the specific company you mean. Attempting to use a number listed for the wrong Unisource increases hold time, risks exposing personal data to the wrong company, and delays issue resolution.

This article explains, step by step, how to identify the exact Unisource entity you need, how to find its verified customer service number, what supporting information to have ready, and how to escalate effectively if first-line support does not resolve your issue. The guidance below is written for business and residential customers who need a fast, defensible path to a verified phone contact.

Which Unisource entities are most commonly encountered

There are three categories you will typically run into when searching for “Unisource”: (1) distribution and supply companies (paper, packaging and janitorial supplies); (2) regional utilities and energy services operating under the UniSource/UNS name; and (3) smaller local companies and resellers that use the Unisource name in a state or country. Confirming which category your account belongs to is the fastest way to a correct phone number.

Start by looking at one authoritative source on any invoice or email: the legal company name (exactly as printed), the billing address, and the domain in the sender’s email (the right-hand side after the “@”). Those three data points uniquely identify the corporate entity and allow you to locate the verified customer-service phone number on the operator’s official website or in state corporate filings.

Quick steps to locate the verified customer service number

• Check your invoice or service notice: read the full legal name, billing address and the sender email domain. This avoids confusion between corporate siblings and local resellers.
• Visit the company’s official website — use the domain from the sender email or search for the exact legal name plus “contact” to find the company’s Contact/Support page. Official contact pages are the authoritative source for customer-service numbers and operating hours.
• If still uncertain, cross-check with the Secretary of State business lookup for the company’s registered address and phone number, or use the Better Business Bureau (BBB) profile which lists main customer-service numbers and complaint procedures.

What to expect when you call: data to have and handling times

Prepare the following before calling: your account number, invoice number, service address, date of the transaction or meter reading, and a concise statement of the issue (e.g., “billing discrepancy of $124.67 on invoice 2025-00432”). Having this information reduces average handle time and moves your call to resolution faster. For business accounts, have your purchase order (PO) number and the name of the purchasing agent to hand: many commercial contracts require PO verification before credits or refunds are issued.

Typical contact centers for distributors and utilities publish operating hours on their support pages; expect business support to be open Monday–Friday, 8:00–18:00 local time, and emergency lines or outage reporting available 24/7. If your issue is billing-related, allow 5–10 business days for a published investigation process and an additional 7–14 days for refund processing where applicable.

Verification, phishing avoidance and escalation

Scammers often advertise fake customer-service numbers that direct callers to social-engineering scripts. Before handing over account numbers or payment information, verify the number by comparing it to the company’s official Contact page or the phone number on a recent official bill (not a screenshot from social media). If the number you find differs from the number on your invoice, call the number printed on the invoice or use the company’s secure customer portal instead.

If the first-line agent cannot resolve your issue, request a written case number and the agent’s name, then ask for escalation — specifically the departmental escalation (for example, “billing appeals”) or the supervisor on duty. For unresolved commercial disputes, note contract reference numbers and the appropriate corporate office; many companies provide a corporate customer relations or dispute-resolution phone number or email for formal appeals.

Alternative channels and documentation best practices

Use the company’s secure customer portal, documented email addresses (found on the official site) or certified mail for dispute notices when you need a written trail. Save timestamps (dates and times), agent names, and case numbers after every interaction. For claims involving credits, refunds or service outages, follow up in writing within 48 hours to create an auditable record.

If you cannot locate the contact details or suspect fraud, use public records: the state business registry, the company’s filings with the Securities and Exchange Commission (if the parent company is public), or the Better Business Bureau. Those sources typically list the company’s principal place of business and official phone numbers that are less likely to be spoofed.

Information to have ready before you call

• Account identifier(s): account number, meter number (for utilities), invoice or PO number and the service or billing address.
• Evidence: scanned invoice or bill (PDF), screenshots of the issue, bank or credit card transaction ID (if a payment is in dispute), and timestamps of software or portal errors.
• Desired resolution: state a simple, specific request such as “I request a corrected invoice showing a credit of $250.00 for duplicated charges” or “I request outage restoration ETA and a written service incident report.”

Final recommendations

If you tell a customer-support agent only the problem (“My bill is wrong”) they will need to ask several questions; instead, present concise facts and a clear desired outcome. Keep records of every interaction and always verify the support phone number against an official source (the company’s website, an official invoice, state business registry or SEC filings for public parents). This approach cuts resolution time, reduces repeated calls, and protects you from impersonation or fraudulent contacts.

If you provide the specific Unisource entity you’re trying to reach (for example: paper-distribution Unisource, regional UniSource energy utility, or a local reseller), I can look up the currently published contact page URL and step-by-step instructions tailored to that corporate entity so you get the verified customer service phone number and escalation path immediately.

Is UniSource still in business?

Over our 35-year history, we have adapted to the rapidly changing workplace environment, expanded our offerings, and nurtured a culture of excellence. Today, we are a 200-employee company providing our bundled services to clients throughout Southern California.

How do I call UniSource Lake Havasu?

877-837-4968
If your power is out, you can report the outage using our free mobile app, by logging in to My Account or by calling us at 877-837-4968.

Who is the owner of UniSource Solutions?

Jim Kastner
Jim Kastner is the founder, chief vision caster and leader of Unisource Solutions. Pioneering the concept of furniture management in 1987, Jim created a firm that would grow from a local provider of furniture services to a premier statewide provider of products, professional services and logistics.

Who owns UniSource Energy Services?

UNS Energy Tucson Electric Power (function(){
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UniSource Energy Services/Parent organizations
UniSource and its sister company, Tucson Electric Power, are among a family of utilities owned by Fortis, Canada’s largest investor-owned gas and electric utility holding company. Fortis completed an acquisition of UniSource Energy Corporation, TEP’s and UniSource’s parent company, in August 2014.

What is the utilita customer service number?

If you need help, please call us on 0345 207 2000. Need help with your bills? If you’re worried about your bill and need some help, call our Billing Team on 0330 053 5669. Click here if you require sign language assistance.

Where is UniSource Energy headquarters?

UniSource Energy Headquarters, 88 E Broadway Blvd, Tucson, AZ 85701, US – MapQuest.