Sorry, I'm confused a bit. They're all OK? .............
If I met her, I would remember.
If I met her, I would have remembered.
If I had met her, I would remember.
If I had met her, I would have remembered.

If I met her before, I would remember.
If I met her before, I would have remembered.
If I had met her before, I would remember.
If I had met her before, I would have remembered.

Question

Sorry, I'm confused a bit.   They're all OK?   .............
If I met her, I would remember.
If I met her, I would have remembered.
If I had met her, I would remember.
If I had met her, I would have remembered.

If I met her before, I would remember.
If I met her before, I would have remembered.
If I had met her before, I would remember.
If I had met her before, I would have remembered.

Answer

If I had met her, I would have remembered.(personally I would use 'it' but it is acceptable)

If I met her before, I would HAVE rememberED IT.
If I HAD met her before, I would have remembered IT.
If I had met her before, I would HAVE rememberED IT.
If I had met her before, I would have remembered IT.

Answer

yes
yes
yes
yes
yes
yep 
yep 
yep

Answer

I'm not sure about all of them actually.

"If I had met her before, I would remember. " sounds correct to me.

But wait for another one's answer in case I might be wrong.