Why can't I send a friend request to someone?

SOURCE: sending new friends requist

it will be just for 1day i also had the same problem but it resolved again in 24hrs it is just bcoz you are very active user of orkut and they are thinking you are a hacker so for verification they are closing you account for 1 day

SOURCE: someone block me in facebook.i

When some one blocks you on facebook, then you dont exist to such a prson as a facebook friend. You dont see his or her posts, and most importantly, you cant contact the person in any form on face book. That was the reason you were blocked in the first place.
So why dont you have fun with the rest of your friends on facebook and totally forget about this person who does not want contacts from you.
You would end up happier, defeating the intended aim; to make you unhappy.
But if you are so insistent on having the facebook contact, you could contac that person on phone or via email, if you hve access to those, and politely ask why he or she doesnt want contact any more.
Whichever way, the bottom line is that you maintain a happy demeanor, because you can no longer access that friend on facebook unless he or she grants you.
Hope that was relieving.
All the best.

SOURCE: HELLO FACEBOOK CUSTOMER CARE SERVICE

i too faced the same problem once they even blocked ma account as a warning .....i think u would hav recieved that too.....if u hav not stopped sending request after that they might have blocked that service
try not to send any more request... it may be helpful ...........gud luck

SOURCE: I can not send friend

please contact facebook support to unblock it.

SOURCE: Why i can't send friend request?

TRY TO SEND REQUEST WITH A COMPUTER IF THAT DOESNT HELP DNT SEND TO MANY FREND REQUEST AS IT MIGHT BE SPAM