Electricity Slamming: What It Is and How to Protect Yourself (2026)

You open your electric bill and notice a supplier you’ve never heard of. You never switched — yet you’re now enrolled with a company charging you twice the market rate. This is electricity slamming, one of the most common consumer protection issues in deregulated electricity markets, and it costs American households millions of dollars every year.

What Is Electricity Slamming?

Electricity slamming is the unauthorized switching of your electricity supplier without your informed consent. It’s named after the analogous telephone slamming problem that plagued the telecom industry in the 1990s. In deregulated electricity markets — where states like Texas, Illinois, Pennsylvania, New York, and New Jersey allow consumers to choose their supplier — bad actors exploit the switching infrastructure to enroll customers without genuine agreement.

Slamming is distinct from cramming (unauthorized charges added to your bill by your existing supplier). Both are illegal, but slamming involves an actual supplier switch, while cramming is a billing fraud that leaves your supplier unchanged.

How Electricity Slamming Happens

Slamming typically occurs through several mechanisms. Door-to-door sales agents are one of the primary vectors — a representative visits your home, claims to be from your utility, says they need to “verify your account information,” and uses the information you provide (or a signature you give for an “energy audit”) to initiate a supplier switch. By the time your next bill arrives, you’ve been enrolled with a third-party supplier at a much higher rate.

Telemarketing slamming works similarly. You receive a call from someone claiming to represent your utility or a “savings program,” and the recorded portion of the call — or a fake verbal agreement — is used to submit a switch. Some operations use robocalls followed by keypad “confirmations” they misrepresent as switching consent.

Online slamming is a newer variant where deceptive websites use confusing opt-in language, pre-checked boxes, or misleading comparison tools to capture your utility account information and initiate an unauthorized switch. Always read the fine print on any site that asks for your account number.

Warning Signs You’ve Been Slammed

The most obvious sign is receiving a letter from an unfamiliar electricity supplier saying you’ve been enrolled. These letters are legally required in most deregulated states — they’re your opportunity to cancel before the switch takes effect. Don’t ignore them. Other warning signs include unexplained increases in your electricity charges, a supplier name change on your bill, and difficulty reaching the supplier listed on your statement.

In Pennsylvania, if you receive a “Letter of Agency” or confirmation notice you don’t recognize, you have three days to cancel the switch with no penalty. New York provides a similar rescission window. Illinois requires a seven-day cancellation period. Know your state’s rules — they’re your safety net.

What to Do If You’ve Been Slammed

Act immediately. First, contact your utility (the distribution company, not the supplier) and report the unauthorized switch. In most states, your utility must return you to default service within one to two billing cycles at no cost. Second, contact the fraudulent supplier directly and demand they reverse the switch and waive any early termination fees. You should not be responsible for ETFs when you were slammed. Third, file a complaint with your state utility commission. Texas has the PUC, Pennsylvania has the PUC, Illinois has the ICC, New York has the PSC. These agencies investigate slamming complaints and can impose significant fines on bad actors.

Document everything: the date you noticed the switch, the supplier name, any letters or communications you received. This documentation supports both your state complaint and any refund request for overcharges during the unauthorized period.

How to Protect Yourself from Slamming

Place a “supplier hold” or “marketing block” on your utility account. Most utilities will add a note to your account that prevents any supplier switch without an additional verification step. Call your utility’s customer service line and ask specifically about this option — it’s free and available in most deregulated states.

Be skeptical of anyone at your door or on the phone claiming to represent your utility. Legitimate utility employees rarely need to switch your supplier to “verify your account.” Ask for credentials, a callback number, and an employee ID. Then hang up and call the utility directly using the number on your bill — not a number provided by the person contacting you.

Never share your utility account number with anyone who contacts you unsolicited. Your account number is the key information needed to initiate a supplier switch. Guard it the way you would a bank account number.

Review your electricity bill carefully every month. Look for any supplier name change, unfamiliar charges, or line items you don’t recognize. Early detection limits how much you can be overcharged before you act.

State Protections Against Slamming

Most deregulated states have enacted specific anti-slamming rules. Texas requires a verifiable confirmation (TPV — Third Party Verification) before any supplier switch can be processed. Pennsylvania requires a written letter of agency or a recorded verbal agreement. New York mandates a 3-day rescission period. Illinois provides a 10-day rescission window on any new electricity contract. Ohio and New Jersey have similar protections.

These protections mean that even if a slamming attempt is made, there’s a window where you can stop it before the switch actually takes effect. This is why reading supplier correspondence — even letters that look like junk mail — is so important.

Slamming vs. Legitimate Switching

Not every surprise supplier switch is slamming. If you forgot about an enrollment, authorized a switch in a moment of inattention, or enrolled through a comparison site and didn’t retain a confirmation, you may have legitimately authorized the switch. The key question is whether you gave informed consent to that specific supplier at that specific rate. If you did, it’s not slamming — though you may still be able to cancel during a rescission period.

When you intentionally switch suppliers through a reputable platform like Choose Energy or SaveOnEnergy, you get a clear confirmation, the supplier’s name and rate, and a rescission window. That’s how legitimate switching works — and it’s worth knowing what it looks like so you can spot the contrast.

FAQ

Is electricity slamming illegal?

Yes. Electricity slamming violates state utility regulations in every deregulated electricity state. The FTC also has jurisdiction over deceptive trade practices. Penalties include fines, license revocation, and in some cases criminal charges for the parties involved.

Will I get a refund for overcharges from being slammed?

In most cases, yes. If you can document the unauthorized switch, state utility commissions typically order the supplier to refund the difference between what you paid and what you would have paid under default service. File your complaint quickly — some states have time limits on refund orders.

How long does a slamming reversal take?

Once you report it to your utility, most states require the switch back to default service within one to two billing cycles. Your utility can tell you the exact timeline for your service territory.

Can slamming happen with electricity and gas at the same time?

Yes. In states where both electricity and natural gas are deregulated (Pennsylvania, New York, Illinois, New Jersey, Ohio), slamming can affect either or both. The same protections apply to both commodities — report both to your utility if you suspect dual-commodity slamming.

What if the slammer charges me an early termination fee to cancel?

You are not legally obligated to pay an ETF for a contract you did not authorize. Send a written dispute to the supplier citing the unauthorized switch and demand the ETF be waived. If they persist, file a complaint with your state commission — unauthorized ETF collection is itself a regulatory violation.

How do I file a slamming complaint?

Contact your state utility commission directly: Texas PUC (puc.texas.gov), Pennsylvania PUC (puc.pa.gov), Illinois Commerce Commission (icc.illinois.gov), New York PSC (dps.ny.gov), Ohio PUC (puco.ohio.gov), New Jersey BPU (njbpu.com). Most have online complaint forms. Also file with the FTC at reportfraud.ftc.gov if you believe you were targeted by a systematic slamming operation.

Electricity slamming is predatory, but the protections available to consumers are substantial. Report it quickly, document everything, and don’t pay any ETF on a contract you never agreed to.