What happens if you lie on a pracipe?

What is a pracipe?

You are obviously not in Colorado because Colorado does not use the term "praecipe" it can mean different things in different states; so, it isn't possible to accurately answer your question. Generally, however, the consequence of "lying" in a court document will depend on what the nature of the document is and how important the "lie" is in connection with what is being done or said. Simply stating, falsely or wrongly, that he talked to you doesn't sound like it has much significance to the ultimate issues to be decided.

The question is unclear if it indicated a telephone conversation (these are easy to support or deny by getting a copy of a phone log) or if it was in person conversation. If it was an in person conversation that was alleged, then it becomes more of a he said to she said type of situation. I always have my clients keep logs of conversations as a practice that has the date, time, whether phone or in person, and notes regarding what was said. Then if the need should arise to verify later then there are notes that have been taken over the course of time. However, in this situation you should attend (with counsel) the hearing and state clearly and calmly that no such conversation took place and any future discussion regarding support should be done in writing to avoid the same situation.

Just make sure you respond to his paperwork and rebut what he said in your declaration.

Unless you have some proof he lied, the court will have to decide who to believe.