Ricoh Aficio MP 161SPF - Manual (Page 160)

Registering Addresses and Users for Facsimile/Scanner Functions
152
7
L
Select the function you want to change the user code for using {U} or {T},
then confirm it by pressing {V}, and then press the {OK} key.
M
Press the {Escape} key.
N
Press [End].
O
Press the {OK} key.
P
Press the {User Tools/Counter} key.
Note
❒ To change the name, see "Changing a Name".
Reference
p.142 “Changing a Registered Name”