Expecting the level to increase slightly, the first guess is Vignere
Without wasting time lets go to dcode.fr to see if it works, and it confidently spews out the plaintext
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ROCCO IVETR ANSFE REDTH EFIRS
TPART OFTHE FUNDS TOYOU RACCO
UNTBU TIMGO INGTO NEEDT OSEET
HEGOO DFIRS TBEFO REWEC ANCOM
PLETE THETR ANSAC TIONT HEFIN
ALTRA NSFER MAYNE EDTOB EPERF
ORMED INPER SONBE ACUSE MYZUR
ICHBA NKAPP EARST OHAVE SUSPI
CIONS ABOUT THEQU ANTIT IESOF
MONEY BEING MOVED AROUN DIFYO
UAREA VAILA BLEWE CANAR ANGEA
MEETI NGPOI NTAND COMPL ETETH
EDEAL YOURS DONNI E
The flag is the location of the bank
and the key TRAFFIC
rearranging the spaces, we get
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ROCCO I VE TRANSFERED THE
FIRST PART OF THE FUNDS TO YOU RACCO
UNT BUT I M GOING TO NEED TO SEE
THE GOOD FIRST BEFORE WE CAN COMPLETE THE
TRANSACTION THE FINAL TRANSFER MAY NEED TO BE
PERFORMED IN PERSON BEACUSE MY ZURICH BANK APPEARS TO
HAVE SUSPICIONS ABOUT THE QUANTITIES OF
MONEY BEING MOVED AROUND IF YOU ARE
AVAILABLE WE CAN ARANGE A
MEETING POINT AND COMPLETE THE DEAL YOURS DONNIE
And we can see people talking about ZURICH which is the place we seek as the location of the bank
For a better analysis, check this video by @hyperreality