In the university's accounts receivable system, customers are identified as Students, Libraries, State agencies, hospitals, etc. These customer codes are then combined into the eight different entity codes:

• B = Business
• F = Faculty/Staff
• N = Non Students
• P = Public Agencies
• S = Students
• T = Third Party Contracts
• V = Virginia Tech Accounts
• X = Past due, no dunning messages

There are also different codes used to identify the age of the account. For example, "1" means 1 - 30 days past due, "2" means 31 - 60 days past due, "3" means 61 - 90 days past due, "5" means current balance due and charges in collections, and "6" means 1 - 30 days past due and charges are in collections. The entity code combined with the delinquency code tells the system how to handle the account. "B1" would be a business with a charge that is 1 - 30 days past due, "C3" would mean a customer that is a college or university and has a charge that is 61 - 90 days past due.

Customer Code Description	1-30 Days	31-60 Days	61-90 Days	Current +	1-30 Past Due	31-60 Past Due	61-+ Past Due
	Past Due	Past Due	Past Due	Collections	+ Collections	+ Collections	+ Collections
A = Student Accounts	S1	S2	S3	S5	S6	S7	S8
B = Business	B1	B2	B3	B5	B6	B7	B8
C = College/University	P1	P2	P3	P5	P6	P7	P8
D = Special 45 Day Bills
E = Non-Student, No dunning/Finance Charge
F = Faculty Staff	F1	F2	F3	F5	F6	F7	F8
FF = Former Faculty	N1	N2	N3	N5	N6	N7	N8
FS = Faculty/Student	S1	S2	S3	S5	S6	S7	S8
GF = Government-Federal	P1	P2	P3	P5	P6	P7	P8
GL = Government-Local	P1	P2	P3	P5	P6	P7	P8
GS = Government-State	P1	P2	P3	P5	P6	P7	P8
H =Hospitals	P1	P2	P3	P5	P6	P7	P8
K = Student, No Finance Charge/Late Fee
L = Library	P1	P2	P3	P5	P6	P7	P8
M = Miscellaneous	N1	N2	N3	N5	N6	N7	N8
N = Non Student	N1	N2	N3	N5	N6	N7	N8
O = Student Organization	V1	V2	V3	V5	V6	V7	V8
P = Public Schools	P1	P2	P3	P5	P6	P7	P8
Q = Squires Student Organization	V1	V2	V3	V5	V6	V7	V8
R = Former Student	N1	N2	N3	N5	N6	N7	N8
S = Student	S1	S2	S3	S5	S6	S7	S8
T = Third Party Contract	T1	T2	T3	T5	T6	T7	T8
V = Va Tech Foundation	V1	V2	V3	V5	V6	V7	V8
X = No Dunning Messages	X1	X2	X3	X5	X6	X7	X8
Y = Non-Student, Payment Arrangement, No Dunning

Past due accounts receive a dunning message on the monthly statement. The entity code and delinquency code determine which dunning message the customer will receive.

Here is a list of Sample Dunning Messages.