ContributionsMost RecentMost LikesSolutionsFormula to test if values provided in two data fields satisfy certain criteria Hello, I built an app that uses QuickBase form to allow users to provide different information about expiring licenses. In this form I'm also introducing various error messages that should explain which field values are wrong and why and also prevent the form from being saved. Form contains two date fields named Expiration Date and Reminder Date and I want to introduce field named Reminder Date Error Message, that will work as follows If Reminder Date is an earlier date ten Expiration Date it should be empty. If Reminder Date is empty and Expiration Date is filled in it should be empty. If Expiration Date is empty and Reminder Date is filled in it should be empty. If Reminder Date is date later then Expiration Date it should return message "Reminder Date is later then Expiration Date". Currently my formula looks like this If(IsNull([Reminder Date]) and IsNull([Expiration Date]),"", If([Reminder Date]<[Expiration Date],"", If([Reminder Date]>[Expiration Date],"Error- Reminder date is later than Expiration Date", If(not IsNull([Expiration Date]) and IsNull([Reminder Date]), "", If(IsNull([Reminder Date]) and not IsNull([Expiration Date]),""))))) but it doesn't work as expected for one case - when Reminder Date is empty and Expiration Date is filled in. In this case formula returns ???. Can you please help me to fix it? Thank you for your help! Arleta ------------------------------ Arleta Maæka³a ------------------------------ Re: How to verify if list of emails has correct domain?Thank you so much Mark for your help! It worked as expected. ------------------------------ Arleta Maæka³a ------------------------------ How to verify if list of emails has correct domain?Hello, I am working on an app where I set up a form where users provide different data. One field that I have is an email field called Notification Recipients. In this field users can provide multiple emails split with semicolon. For example: 'A.M@domain.com;A.M2@domain2.com;A.MM@domain.com'. I'd like the form to be accepting only the emails that have '@domain.com' and for others to provide an error message and not allow the form to be submitted. I tried to set up a formula field for that, but that failed for such list. I will be grateful for any hints or suggestions on how to solve my problem. ------------------------------ Arleta Maæka³a ------------------------------