From the SECO energy website itself:
SECO Members in The Villages Targets of Payment Scam – SECO Energy
If you don't want to click, here's the summary: scammers are calling Villagers, demanding immediate (within 30 minutes) payment or they'll shut off power.
There are trucks in the area to fool people into thinking it's legit.
SECO will NEVER show up demanding payment in person at your door, will NEVER accept payment at your house, and will not turn your power off after business hours or on weekends.
This is a SCAM. If you are hit with it, call the police. DO NOT PAY, do not agree to pay, do not agree to talk with anyone, and do not answer the door if the pretenders show up.