T1
Purchase an item

S1
not paid

C1
Customer must be
logged into the
system

C2
Select payment
method

E1
Record selected
payment method

E2
Does not record
selected payment
method

Selection

Selection

S2
pending
payment

S1
not paid

M1
Please choose a
payment method

M2
Proceed with the
payment?

C3
Check lay-by

C4
Check and
calculate loyalty

E3
Proceed
payment