Friday Riddle / Teaser - EARLY

Since I will be unplugged tomorrow and not a work, I thought I would post it early. Here we go:

An old lady has put her life savings in a safe place but she can never remember where it is. To remind herself, she has written the location down in a secret code. While she is out, a thief breaks into the house and finds the coded message. Will he discover the location of the money before the old lady returns?

RM GSV YRT
TIVB HFRG
XZHV FMWVI
GSV YVW