A message for someone I know stating they need to set up delivery of legal documents with an apparent refusal to sign for them and to avoid legal issues it says to all them immediately with a reference number so they don't pursue more legal action

The number they called from was unknown but the 424-218-6418 was the number they left. They stated the tried to serve legal documents in there was a refusal to sign on my behalf and that I have to call back with in 2 hours to avoid further legal issues. They left a case number as well.

A phone call, email or text message from a supposed debt collector is not legally sufficient evidence of debt.

The Fair Debt Collection Practices Act (FDCPA) includes statements such as this:

Unless the original communication contained this specific information, every collector must send you a written “validation notice” telling you how much money you owe within five days after they first contact you. This notice also must include the name of the creditor to whom you owe the money, and how to proceed if you don’t think you owe the money.   ["Written" means snailmailed - US Mail ... not emailed or texted]

Source:
https://www.consumer.ftc.gov/articles/0149-debt-collection

Therefore, if that caller wants you to pay immediately, before you get the written validation notice via snailmail, or if the caller wants payment via Green Dot, MoneyGram, Western Union, prepaid gift card or other untraceable means, then the call is definitely not legitimate.

REMEMBER THIS IF YOU FORGET ALL ELSE:
1.  Legally, THEY must prove you owe the debt (you do not have to prove to them that you do not owe the debt)
2.  They must prove they have a legal right to collect the debt
3.  They must send you snailmail with specific info within 5 days of the original contact, if you request that validation, or if that information was not provided on initial contact.  You have up to 30 days to reply to that validation.

IF you wish to communicate with the supposed collector / creditor, visit  the following page, for example "Action Letters" to snailmail:
http://www.consumerfinance.gov/blog/debtcollection/

If you KNOW you owe no money, or believe the call was from a fake debt collector, please take the time to read this:
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors

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Please reply to this post, to let us know you read it, or have taken suitable actions to protect yourself.

I had the exact same call.. I owe nothing outstanding... no one lives with me.. there was no one here to sign! The call was all wrong..

They stated I had to call them up to sign documents and that if I don't then I will be served with a subpoena. I know it's a scam . They even gave me a bogus case number then hung up quickly.