What prefixes do
Every document in Project Commander is assigned a unique reference number — for example, VO-001 for the first Variation or INV-001 for the first Invoice. The system prefixes page lets you control the prefix letters and starting number for each document type.
Viewing and editing prefixes
Navigate to Settings > Configuration > System Prefixes. The table lists every document type with its current prefix and starting number. Use the Category filter to narrow the list by group.
| Category | Document types |
|---|---|
| General | Projects |
| Contract Management | Variations, Dayworks, Applications, Payment Notices, Invoices, Sales Credit Notes |
| Procurement | Purchase Orders, Delivery Notes, Goods Return Notes, Invoice Checking, Credit Notes, Direct Costs |
| Subcontractor | Subcontractor Orders, Subcontractor Invoices, Subcontractor Applications, Subcontractor Payment Notices, Subcontractor Work Records |
| Global | Global Invoices, Global Credit Notes, Time Sheets |
Default prefixes
| Code | Document type |
|---|---|
PR | Projects |
VO | Variations |
DW | Dayworks |
APP | Applications |
PN | Payment Notices |
INV | Invoices |
SCN | Sales Credit Notes |
PO | Purchase Orders |
DN | Delivery Notes |
GRN | Goods Return Notes |
IC | Invoice Checking |
CN | Credit Notes |
DC | Direct Costs |
SO | Subcontractor Orders |
SINV | Subcontractor Invoices |
SAPP | Subcontractor Applications |
SPN | Subcontractor Payment Notices |
SWR | Subcontractor Work Records |
GI | Global Invoices |
GCN | Global Credit Notes |
TS | Time Sheets |
Changing a prefix or starting number
- 1
Find the document type you want to change in the table.
- 2
Click the Prefix cell and type your preferred prefix — for example, change
VOtoVAR. - 3
Click the Starting Number cell and enter the number you want the sequence to begin from.
Changes are saved inline as you edit.
Changing a prefix or starting number does not rename existing documents. Only documents created after the change will use the new prefix and numbering.
Next steps
- System Defaults — configure default project types, billing methods, and markup percentages.
- System Notes — set up predefined notes for different document types.