Does an agreement have to be signed to matter?

That depends on the transaction, facts and applicable law. Some agreements may be evidenced through communications and conduct, while others can have formal requirements.

Are text messages useful?

They may help show instructions, price discussions, approvals, complaints or payment promises. Preserve the complete conversation and context.

Does a part payment prove the whole amount?

It may be relevant, but its meaning depends on the surrounding facts. Record it accurately without overstating its legal effect.

Should I create a statement now?

You can create a truthful note of what you remember, clearly dated as a new note. Do not backdate it or present it as contemporaneous.

Unpaid Invoice Without a Contract: Records to Organise

Organise unpaid-invoice evidence without a written contract

If there is no signed contract, collect the records that show what the parties said and did: quotes, purchase orders, messages, work instructions, delivery or completion records, invoices, part payments and later responses.

General information only — not legal advice · Reviewed 2 October 2026

General organisation guideChoose country and region before relying on jurisdiction-specific legal steps or deadlines.

Choose location

Start with the agreement trail

Quote or estimate
Purchase order
Booking or order confirmation
Emails or messages describing scope and price
Customer instructions or approvals

Show what was supplied

Delivery receipts
Signed job sheets
Timesheets
Completion photos
Customer approval messages
Requests for changes or further work

Show the price and payment history

Add the invoice, stated payment terms, deposits, part payments, credits and customer messages about payment.

Record verbal discussions carefully

Create a factual later note with the approximate date, participants, what you honestly remember, when the note was created and any related messages or actions.

Practical record

Question	Records that may help
Who were the parties?	Customer details, orders, invoices, payment records
What was requested?	Quote, instructions, messages, job notes
What price was discussed?	Quote, estimate, messages, prior dealings
Was work accepted?	Approvals, delivery records, use, later requests
Has any amount been paid?	Deposit, part payment, bank record, receipt

Important limitation

GetInstantProof does not decide whether a contract exists or whether any agreement is legally enforceable.

Related evidence guides

Keep building the record

Unpaid invoice evidence checklist Build an unpaid invoice timeline Start-to-finish unpaid invoice example

Continue the journey

Use the right tool for the next job

GetInstantProofBuild the complete invoice timeline.GetInstantResolvePrepare a proportionate unpaid-invoice resolution plan.GetInstantLawCheck legal information for your country and state or region.

Common questions