As far as I can recall...
🔸If I remember correctly...
🔸 It rings a bell
🔸 As far as I can remember...
🔸 I'll never forget that...
🔸 As I recall...
🔸If I'm not mistaken...
🔸I'll always remember...
🔸 I have a vague
recollection of..
🔸 if my memory serves me correctly ...
🔸 Now I come to think of it...