Def of a force: A FORCE PLAY is a play in which a runner legally loses his right to occupy a base
by reason of the batter becoming a runner.
Def. of an appeal: An APPEAL is the act of a fielder in claiming violation of the rules by the offensive
team.
7.08d:(d) He fails to retouch his base after a fair or foul ball is legally caught before he, or his
base, is tagged by a fielder. He shall not be called out for failure to retouch his base
after the first following pitch, or any play or attempted play. This is an appeal play
7.10a: 7.10 Any runner shall be called out, on appeal, when—
(a) After a fly ball is caught, he fails to retouch his original base before he or his
original base is tagged;
These are all the rulebook quotes to support clawdad's quote above. Remember you can never be forced backwards. This is a very common misconception in baseball. The play yu describe is a live ball appeal. Hopefully you will stick around and dispell some more myths.
OBR-It is a delayed dead ball, if all runners advance at least a base and the BR makes at least first, then the balk is ignored. If all these conditions aren't met then enforce the balk and bring the batter back with the same count.
Fed: Immediate dead ball, enforce the balk.
mstaylor's post in Pitcher Balk was marked as the answer