Rachsa
From Halachipedia
- One should wash with a Bracha before eating the Matzah. [1]
- If one know that one watched one's hands and one didn't touch an area that requires Netilat Yadayim one should wash without a bracha. [2]
- If one is sure that one watched one’s hands from touching something that requires Netilat Yadayim then one should rewash before eating Matzah without a Bracha. According to Ashkenazim preferably one should cause oneself to need to wash one’s hands with a Bracha. [3]