C.R.S.
Section 5-1-203
Jurisdiction and service of process
(1)
The court of record of any judicial district in this state may exercise jurisdiction over any creditor with respect to any conduct in this state governed by this code or with respect to any claim arising from a transaction subject to this code. In addition to any other method provided by the Colorado rules of civil procedure or by statute, personal jurisdiction over a creditor may be acquired in a civil action or proceeding instituted in the court of record by the service of process in the manner provided by this section.(2)
If a creditor is not a resident of this state or is a corporation not authorized to do business in this state and engages in any conduct in this state governed by this code or engages in a transaction subject to this code, the creditor may designate an agent upon whom service of process may be made in this state. The agent shall be a resident of this state or a corporation authorized to do business in this state. The designation shall be in writing and filed with the secretary of state. If no designation is made and filed or if process cannot be served in this state upon the designated agent, process may be served upon the secretary of state, but service upon the secretary of state is not effective unless the plaintiff or petitioner forthwith mails a copy of the process and pleading by registered or certified mail to the defendant or respondent at his or her last reasonably ascertainable address. An affidavit of compliance with this section shall be filed with the clerk of the court on or before the return day of the process, if any, or within any further time the court allows.
Source:
Section 5-1-203 — Jurisdiction and service of process, https://leg.colorado.gov/sites/default/files/images/olls/crs2023-title-05.pdf
(accessed Oct. 20, 2023).