Castor CDMS allows a PI to sign each visit, form, and repeating data instance.
Oftentimes, it is only required that the PI sign the participant once a subject is discharged from a study.
If the latter is the case, it is an option to add an "End of Study" visit to your study.
Here you can collect the reason for the subject's discharge (discontinued, completed, etc.) and opt to have the PI only sign this visit as an indication that the participant is signed.
Castor advises clients to be mindful of regulatory requirements based on their individual regulatory needs.