How sales evidence enters monthly bookkeeping

The invoice record

For each sales invoice, retain:

• unique invoice identity and version;
• customer and supplier identity;
• service or supply description and relevant date;
• issue date, due date, amount, currency, and tax details;
• original electronic file or structured e-invoice content;
• payment terms and expected channel;
• links to correction, cancellation, credit, or refund;
• payment allocation and remaining open amount.

The exact legally required fields and format depend on the case. A template can support preparation but cannot certify the invoice.

Status is more than paid or unpaid

Do not overwrite the original invoice file when a correction occurs. Preserve the relationship and reason.

Four ways sales evidence enters the month

Not every business begins with the same invoice PDF:

The preparation job is to preserve the source type, connect later corrections and payments, and show what is still unknown. DeinHans is not being presented here as an invoice-creation, billing or dunning system.

Worked month-end example

A synthetic studio issues a €2,380.00 invoice on 29 June for a service completed in June. The customer pays on 8 July.

June preparation keeps the invoice and service context in the June evidence set and shows the open customer amount. July bank reconciliation connects the €2,380.00 receipt to that invoice. The accountant applies the correct recognition and tax treatment for the business.

If the customer pays €2,300.00, the remaining €80.00 is not silently rounded away. It stays open until a discount, fee, deduction, dispute, or second payment explains it.

This example does not determine the VAT or profit period for a real invoice. It shows why invoice and payment dates must remain separate.

Pre-handoff checklist

• Are invoice numbers and versions unique and traceable?
• Is the customer identity correct?
• Are service and issue dates present and unambiguous?
• Is the original e-invoice content retained where required?
• Are cancelled drafts separated from issued invoices?
• Are credit notes and corrected invoices linked?
• Do bank receipts settle the right invoice or group of invoices?
• Are disputes and residual balances visible?

Who owns the decision

The business owns the commercial facts: what was supplied, to whom, when, and under which terms. Software can preserve the document, track status, and suggest payment links. The accountant or tax adviser reviews invoice requirements, recognition, VAT, and corrections.

DeinHans can recognise supported income evidence, retain the source and visible sales facts, prepare customer or payment context, and ask focused questions when dates, counterparties or totals conflict. It does not create a legally valid invoice merely by processing a file, operate the customer’s billing workflow, or imply that payment matching approves tax treatment.

Source-to-result example

A June intake contains a €2,380 customer invoice, a platform report with €4,920 of sales and a €4,510 settlement, and €760 of manually documented on-site revenue. DeinHans prepares these as three distinct sales-evidence cases. The €2,380 July bank receipt can later settle the named invoice. The €4,510 platform deposit belongs to a payout reconstruction, not directly to the €4,920 sales total. The €760 evidence remains tied to its stated channel and period. The sources are combined for review without pretending they are the same kind of record.

The useful end state

At handoff, every issued invoice is either settled, partly settled, disputed, corrected, refunded, or explicitly open. The reviewer sees the original source and the whole status history. That is more useful than a sales total whose underlying invoices and payments cannot be reconstructed.

Sequence and cut-off controls

Maintain invoice-number continuity and explain cancelled or unused numbers. Compare issued invoices with the sales or delivery source for the same cut-off, including credit notes. A complete number sequence does not prove every service was invoiced, so test completed orders or milestones back to billing as well.

Freeze the period report used for handoff. If an invoice is issued, corrected or cancelled later, link the change and follow the approved period-correction process. Do not backdate documents merely to make a monthly sales total agree.

For recurring customers, recheck legal entity, address, contractual service and tax facts when they change. A copied invoice template can preserve an obsolete customer or VAT statement long after the commercial arrangement moved on.