What if there is no written contract?

Collect the records that show the surrounding agreement, such as quotes, messages, purchase orders, delivery records, invoices, part payments and later conduct. Do not present a reconstructed note as an original record.

What if the customer disputes the quality of the work?

Keep the complaint and your response together with scope records, completion records, photographs, inspection material and repair or rectification offers.

Should I include interest or late fees?

Record the term you rely on and show the calculation separately. Whether interest or a fee can be claimed depends on the agreement and applicable law.

What if part of the invoice has been paid?

Record every payment and credit with its date and amount and make the remaining balance easy to verify.

Unpaid Invoice Evidence Checklist

What was agreed

Add the signed contract, accepted quote, purchase order, scope of work or messages showing what the customer asked you to provide. If the agreement was verbal, create a factual note and label it as a later recollection.

Proof of delivery or completion

Delivery receipts
Signed job sheets
Timesheets
Completion photographs
System or access logs
Customer approval messages

Invoice and payment terms

Keep the original invoice, issue date, due date and payment terms. Record credits, adjustments and part payments separately rather than editing the original invoice.

Reminders and customer responses

Preserve emails, messages and letters in their original sequence, including replies that dispute quality, scope, delivery, price or the balance.

Build a dated debt timeline

Agreement
Supply or completion
Invoice issue
Due date
Reminders
Customer replies
Payments and credits
Current unresolved balance

Practical record

Record	Why it matters	Date/status
Agreement or accepted quote	Shows the recorded scope, price or instructions	Keep the original version
Supply or completion record	Connects the invoice to what was delivered or done	Link the delivery/completion date
Invoice	Shows the invoiced amount and stated payment terms	Record issue and due dates
Reminder or customer reply	Shows what happened after the due date	Keep proof of sending and the full response
Payment or credit	Explains changes to the outstanding balance	Record each amount separately

Organisation example only. Whether a debt is enforceable, and what formal recovery route applies, depends on the facts and jurisdiction.

Important limitation

GetInstantProof organises material you provide. It does not decide whether a debt is legally enforceable or guarantee recovery.

Related evidence guides

Keep building the record

Build an unpaid invoice timeline Evidence when there is no written contract Start-to-finish unpaid invoice example

Continue the journey

Use the right tool for the next job

GetInstantProofBuild the detailed unpaid-invoice timeline.GetInstantResolvePrepare a reminder, demand or follow-up plan.GetInstantLawCheck legal information for your country and state or region.

Common questions

Organise proof for an unpaid invoice

From source records to one clear Proof Pack.