i was wandering if i make i shvua , but didnt say it out loud, only wrote it and then signed it.
is it binding, or do i need to SAY it in order for it to be binding
all the best
A shavua [oath] is only binding when actually spoken. However, one has a lesser obligation to keep to his word even though it is not an actual vow.
Shu”t Mabit 1:240, Bais SHlomo Y:D 2:187, Shu”t Rebbi Akiva Eiger 29, Chochmas Adam 101:20