How do you spell regestation?

The word "regestation" is not a standard English word. It's likely a misspelling of one of the following:

* Registration: This is the most common option, meaning the act of officially recording something.

* Re-registration: This means to register again, possibly after a previous registration has expired.

* Regeneration: This refers to the process of renewal or regrowth.

It's important to make sure you're using the correct word for the intended meaning.