“Please call in your credit card. ” What does it mean?

wzc722: “Please call in your credit card. ” What does it mean?
I’m an English learner. I don’t quite understand this sentence. Can anybody help me?

Answers and Views:

Answer by Geezer Geek
Whoever is telling you this wants you to call them on the phone and give them your credit card information.

Beware, such instructions can be legitimate, but they can also be a fraud scheme designed to steal your money.

Use your best judgement here.

Answer by crewchief_74
The phrase ” Please call in with your credit card handy” is used on tv infomercials mostly, when some obnoxious pitchman is trying to convince you to buy some useless item that you could, in most cases, buy for less at your local Walmart, K-Mart or swap meet for less