Electric Supplier Changed Without Permission? How to Spot Slamming on a Bill

If your energy supplier changed without permission, do not start by guessing who is at fault. Start by proving what changed. Compare the current bill with the last normal bill, then look for a new supplier name, supply-rate line, enrollment or contract ID, welcome notice, early-termination language, or authorization record you do not recognize. A new supply line can be legitimate in some competitive energy-choice states, but an unexplained switch can also be a possible “slamming” problem: an unauthorized supplier change. Ask the utility and supplier for the enrollment proof, keep paying undisputed utility charges when you can, and escalate through your state utility commission or official energy-choice complaint path if the switch cannot be explained or corrected.

Quick check: what changed on the bill?

Use this bill line-item comparison guide before calling anyone. Put the last normal bill beside the bill that surprised you.

Bill line or account detail	Last normal bill	New bill	What it may mean	What to ask for
Electric or gas utility name	Your delivery utility	Same utility	The delivery company may not have changed	Ask whether a supplier enrollment was added
Supplier, supply, generation, or commodity line	Utility default supply or old supplier	New supplier name	Possible supplier switch	Ask for enrollment date, channel, and authorization proof
Rate, term, or plan name	Prior supply rate or default service	New rate or plan label	New contract terms may be active	Ask for the contract summary or disclosure statement
Account, contract, or enrollment ID	Blank or old ID	New ID	Supplier may have an enrollment record	Ask who authorized it and how
Welcome letter, confirmation, email, or phone record	None found	Notice you missed or do not recognize	Could be a legitimate but unnoticed enrollment, or a red flag	Ask for the full notice and cancellation/reversal options
Fees or cancellation language	None	Early termination or supplier fee language	A contract may have been attached	Ask whether the fee applies if authorization is disputed
Usage and meter reading	Similar pattern	Similar usage but different supply price	The problem may be supplier/rate, not usage	Separate usage disputes from supplier-switch disputes

This table is not a legal finding. It is a way to organize proof so you can ask specific questions instead of saying, “My bill looks wrong.”

What “slamming” means in plain English

In a utility-bill context, people often use “slamming” to mean an electric or gas supplier was changed without valid permission from the customer. The exact legal definition, enrollment rules, rescission window, refund rules, and complaint process depend on your state and utility market. That is why this page does not give one universal rule.

Official energy-choice programs show why the bill can be confusing. Ohio’s Energy Choice site, run by the Public Utilities Commission of Ohio, lists certified suppliers, customer-rights resources, questions to ask suppliers, and consumer complaint routes. Pennsylvania’s official PA Power Switch site separates electric distribution companies from suppliers and points consumers to official shopping and contact resources. New Jersey’s Board of Public Utilities publishes customer-rights and complaint assistance information for utility issues. Those pages do not make every state identical; they show the right pattern: use your own state’s official utility regulator or energy-choice program when supplier switching is disputed.

Step 1: separate the utility from the supplier

Most surprise-switch problems start with one misunderstanding: the delivery utility and the supplier may not be the same entity.

Your bill may include:

• delivery or distribution charges from the utility that maintains lines, meters, service, and outage response;
• supply, generation, commodity, or energy charges from the company that supplies the electricity or gas;
• taxes, riders, public-purpose charges, or local fees that are not supplier fraud by themselves;
• past-due balances, budget billing adjustments, deposits, or corrections that can look like a supplier issue but are not the same thing.

Write down exactly which line changed. If only usage or an estimated reading changed, the better guide may be an estimated-bill or high-bill dispute. If a supplier name or supply plan changed, continue with the supplier-switch workflow.

Step 2: look for the authorization trail

Before filing a complaint, search for the records that would explain a legitimate switch:

1. Email: search the supplier name, “energy choice,” “enrollment,” “confirmation,” “contract,” and your utility name.
2. Mail: check for a welcome letter, terms document, or state-required disclosure.
3. Texts and calls: look for recent sales calls, door-to-door paperwork, or a household member who may have approved something.
4. Online account: check whether your utility account shows supplier history, effective dates, or pending supplier changes.
5. Payment records: note whether only the bill changed or whether a separate card/bank charge appeared.

If another adult on the account authorized the switch, your next step is different from an unauthorized-change complaint. If nobody can identify the authorization, ask for proof.

Step 3: call with a narrow script

Call the utility first if the bill is issued by the utility. Then call the supplier listed on the bill if needed. Keep notes.

Use this script:

“My bill shows a supplier or supply-plan change I do not recognize. I am not accusing anyone yet. Please tell me the supplier name, enrollment date, channel used, authorization record, account number affected, rate or term now applied, and the process for disputing or reversing the switch if authorization cannot be verified.”

Ask for:

• the effective date of the supplier change;
• the supplier’s legal name and customer-service contact;
• the enrollment channel: online, phone, door-to-door, aggregator, broker, or municipal aggregation;
• proof of authorization, such as a recorded verification, signed agreement, IP/account confirmation, or disclosure document;
• whether a cancellation or rescission option exists in your state or contract;
• whether any supplier fee, termination fee, or rate change is disputed while authorization is reviewed;
• the complaint number or case number for the call.

Do not rely on a verbal promise alone. Ask where the written case notes, confirmation, or follow-up email will appear.

Step 4: decide whether to pay, dispute, or escalate

Avoid two extremes: ignoring the whole bill, or paying every disputed supplier charge without preserving your rights.

A safer middle path is:

• pay undisputed utility delivery charges if you can, especially if nonpayment could create service or late-fee problems;
• clearly mark the supplier/supply portion as disputed in your notes and calls;
• ask the utility how partial payments are applied before sending one;
• ask the supplier for a written hold or review of disputed charges if authorization is under investigation;
• keep every confirmation number, screenshot, bill PDF, and call log.

If the supplier change caused a separate credit-card, debit-card, or bank-account charge you did not authorize, the FTC’s consumer guidance supports contacting the payment issuer or bank promptly and asking about unauthorized-payment protections. If the issue is a credit-card billing error, FTC guidance also notes that billing-error disputes have formal timing and written-dispute requirements. That payment path is separate from the utility-regulator path, so document both if both apply.

Step 5: escalate through the right regulator

If the utility or supplier cannot produce valid authorization, will not explain the supplier line, or will not tell you how to dispute the change, use official channels:

1. Your state utility commission, public service commission, or public utilities board.
2. Your state’s official energy-choice shopping or supplier-comparison site, if it has complaint instructions.
3. Your state attorney general or consumer-protection office when the problem involves deceptive sales conduct.
4. The FTC for scam-reporting guidance when the facts look like impersonation, deceptive solicitation, or unauthorized payment activity.

Use state examples carefully. Ohio, New Jersey, and Pennsylvania publish useful official consumer resources, but their rules do not automatically apply to another state. Search for your state name plus “utility commission supplier complaint” or use the complaint link on your own utility commission’s site.

What not to do

Do not name the supplier online as “fraudulent” based only on one bill. Say the supplier is “unrecognized,” “disputed,” or “not authorized by me” until you have proof.

Do not stop paying the entire utility bill without understanding how your utility treats partial payments and service risk. A supplier dispute is not always a defense to delivery charges, taxes, or prior balances.

Do not assume the utility can instantly reverse everything. In some markets the utility bills on behalf of suppliers, but the supplier may still control parts of the contract record.

Do not accept a new plan or retention offer until the old authorization question is resolved. A new agreement can muddy the evidence trail.

Mini example: the new supplier line

Say August’s electric bill listed your utility’s default supply. September’s bill still names the same delivery utility, but the supply section shows a supplier you do not recognize, a new rate label, and an enrollment ID. You search email and mail and find no welcome notice. Your next move is not to accuse the company online. It is to ask the utility for the supplier-change effective date and ask the supplier for authorization proof. If neither can show valid authorization, file with your state utility commission or official energy-choice complaint route and attach both bills.

Evidence packet to keep

Save a folder with:

• the last normal bill and the first changed bill;
• screenshots of the supplier line, rate line, contract ID, and usage line;
• any welcome notice, email, mailer, door-to-door document, or call log;
• names, dates, and case numbers from the utility and supplier;
• payment confirmations and bank/card records if money moved outside the utility bill;
• copies of any state commission, attorney general, or FTC reports.

The goal is a clean timeline: what changed, when it changed, who says it was authorized, what proof exists, and what remedy you requested.

FAQ

Is every new supplier name on my bill slamming?

No. A new supplier name can be the result of a legitimate enrollment, household-member authorization, municipal aggregation, or account change. Treat it as a possible unauthorized switch only after you compare bills and cannot find a valid authorization trail.

Should I call the utility or the supplier first?

If the utility issued the bill, start with the utility so you can confirm what changed on the account. Then contact the supplier for the authorization record, contract terms, or dispute process.

Can I demand an immediate refund?

You can ask how disputed supplier charges, reversals, or credits are handled, but do not assume a universal refund rule. State rules, supplier terms, bill timing, and the evidence of authorization all matter.

Where do I report an unauthorized supplier switch?

Use your state utility commission, public service commission, public utilities board, or official energy-choice complaint route. If there was deceptive solicitation, impersonation, or unauthorized payment activity, also review FTC consumer guidance and your payment issuer’s dispute process.

What should I say if I am not sure it was unauthorized?

Say: “I do not recognize this supplier change and I need the authorization record.” That is accurate, preserves the issue, and avoids unsupported accusations.

Claim ledger

Claim in this guide	Source trail	How to use it safely
Competitive energy-choice bills can involve both a delivery utility and a separate supplier or supply choice.	Public Utilities Commission of Ohio Energy Choice resources and PA Power Switch electricity shopping resources, accessed September 3, 2026.	Use this only as a bill-reading framework. Supplier names, terms, rescission rights, and complaint steps are state-specific.
A state utility commission, public service commission, public utilities board, or official energy-choice program is the right escalation lane for unresolved utility supplier or billing disputes.	New Jersey Board of Public Utilities customer-rights resources, Ohio Energy Choice complaint/resource navigation, and PA Power Switch contact resources, accessed September 3, 2026.	Do not copy another state’s rule. Use the reader’s own state regulator and utility account records.
Suspected scams, unauthorized payments, or credit-card billing errors may also require payment-issuer or FTC-style consumer-protection steps.	FTC Consumer Advice on what to do if scammed and unauthorized/incorrect credit-card billing errors, accessed September 3, 2026.	Apply this only when money moved through a card, debit card, bank account, or scam-like solicitation; it does not replace the utility-regulator complaint path.

Sources checked

• Public Utilities Commission of Ohio, Energy Choice Ohio Apples to Apples supplier comparison and consumer resources, accessed September 3, 2026.
• New Jersey Board of Public Utilities, Customer Assistance and Consumer Rights page, accessed September 3, 2026.
• PA Power Switch, official Pennsylvania electricity shopping and contact resources, accessed September 3, 2026.
• FTC Consumer Advice, “What To Do if You Were Scammed” and billing-error guidance for unauthorized or incorrect credit-card charges, accessed September 3, 2026.