The REDCap Validation tool allows you to specify that field value should be a number, integer, date in a particular format, email address, etc… You can find Validation options in the "Edit field" options fot each field.
Tag fields containing PII (personally identifiable information) as an identifier* field:
*Need examples of what counts as identifying information? Here's a list of identifiers you must remove from HIPAA-protected data before sharing
.