Password security notifications

while I was successful in changing many of the passwords identified as “security notifications” on my iPad, several of them - the ones I couldn’t change by clicking on the “change password on website link” (for some reason) and had to go to the website independently - are still showing up as “security notifications”. How do I get rid of these notifications for the passwords I have already changed? I know I’ll forget which ones are now ok if they aren’t removed.