For how long are validations valid?
Validations of domain names and email addresses are valid for 30 days. After the 30 days they must be re-validated. Identity and organization validations are valid for 350 days. After the validation period expires they must be re-validated exactly the same way as the first time. The validation period must not be mistaken with the validity of certificates which may be one and two years, depending on the verification level.