877-812-5818

Someone from this number called me about a payday loan from 2008. They are threatening to come to my home, or work place. Saying they have a summons for me to go to court. They say a process server is coming out to my home to serve me papers. They claim this loan has been to 3 different collection agencies, and now is at their office. Are they legit? They refuse to send me any paperwork to back them up. What do I do??

Did you take out a loan and notpay it?  If so, pay your debt.  

If you didn't take out a loan the caller is this scammer:  
https://800notes.com/forum/ta-1b47a30428c1e14 ... ew-numbers-here
Don't pay him.  Hang up on him.  There is no summons.

Legit collectors per section 809 of the FDCPA http://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre27.pdf *must* tell you at initial contact, or send you paperwork within 5 days of initial contact, the following:
1. $amount of debt,
2. name of the current creditor (which may differ from the original creditor who might have sold your debt),
3. a statement that that debt will be assumed to be valid unless you dispute in writing within 30 days,
4. a statement that that if you do dispute in writing within 30 days, the collector must mail you written verification of the debt,
5. a statement that if you ask the collector in writing within 30 days, the collector must send you the name and address of the original creditor if it's different from the current creditor.
If you don't get the 5 disclosures, orally or in writing (you do not have to ask for them, the FDCPA requires collectors to provide them), treat the collector like you would any SCAMMER.
Has the statute of limitations for your state http://www.fair-debt-collection.com/SOL-by-State.html expired on your debt? If expired, don't pay.
Collectors generally have to be licensed by your state to practise (collect debt) in your state and you can find out by calling your state Attorney Generals Office. Ask if a license is required and does this collector have one. If not licensed, don't pay and file a complaint.
Read useful debt-collection FAQs from the FTC here http://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre18.shtm 
Be aware that scammers are using bought/hacked/phished loan application data to extort payments for fictitious debts from victims and victims' families and friends.
The FBI warns about payday loan extortion scams here http://www.fbi.gov/news/pressrel/press-releases/paydayloanscam_120710 
The BBB has issued several alerts on this scam, just google "bbb.org alert phony debt collector"
Report to the Internet Crime Complaint Center http://www.ic3.gov/complaint/default.aspx , the Federal Communications Commission http://esupport.fcc.gov/complaints.htm , the Federal Trade Commission https://www.ftccomplaintassistant.gov/ and your state AG, as appropriate.

That was very helpful. Thank you!