Legitimate process servers do not call to warn you, or to get money from you to stop the process. They will deliver the notification without warning.
Also, if you were threatened with an "arrest warrant" via a phone call or email, read this:
http://news.uscourts.gov/warning-arrest-warrant-scam
"The warrant is phony. A valid warrant would not be served by fax or e-mail. It would be served in person by a U.S. Marshal or other law enforcement officer."
"Anyone receiving a fake arrest warrant should contact the FBI or the district U.S. Marshals Office. If there is any question regarding the authenticity of a warrant, contact your district clerk of court."
Phony federal arrest warrant coming from something called Mojarad lawfirm in Italy Texas, according to complaints at other sites. No such law firm can be found.
If you call them, they will ask you for your social security number. Don't give them any information. This is a total scam.
So stupid. Judges do not issue arrest warrants to law firms. They are only issued to duly constituted law enforcement agencies on probably cause that a named person in the warrant has committed a crime. Most likely Indian scammers.