Changelog

API changes, newest first.

2026-10-30

• New — Manual bookings can be reversed with POST /journal_transaction/{id}/reverse, which creates a linked booking with debit and credit swapped. A reversed booking can't be edited or deleted (422).
• New — Journal transactions return reverses, reversed_by, can_delete, can_edit_in_place, edit_requires_reversal, can_reverse and default_reversal_date for manual bookings.
• New — Organization settings accept immutableJournal. While it is enabled, deleting a manual booking created before today returns 422 with code: "immutable_journal" and updating it reverses the original and creates a new booking, optionally on reversal_date. The setting can't be disabled once enabled.
• New — Expense payments accept the types cash_discount, credit_note and payables_write_off, which settle a bill's open amount without a bank transfer and reverse its booking pro rata. Payments return type and is_remainder_payment.
• New — Expenses return is_written_off and has_remainder_payment. While a bill has a remainder payment, changing its positions, issue date, currency or status returns 422.
• New — The webhook event expense/written-off is sent when a bill's open amount is written off.
• Changed — Expense payments of type cash_discount, credit_note or payables_write_off can't be updated (422), only deleted. The global expense payment list returns payments of type creditor_payment only.

2026-10-29

• Changed — Matching a bank transaction manually returns 422 when the transaction already has a reconciled match.

2026-10-28

• Fixed — Invoices return payable_in_days as the positive number of days from issued_at to due_at.

2026-10-23

• New — Invoice payments accept the type cancellation, which cancels the open amount of a sent invoice on executed_at. Deleting the cancellation payment reactivates the invoice.
• New — Invoices accept the include latestOutgoingMail, which returns the delivery status of the last email sent for the invoice, per recipient.
• New — Offers accept the include latestOutgoingMail as well.
• New — Invoices return status (draft, scheduled, pending, overdue, paid or cancelled).
• New — Invoices return is_cancelled and cancelled_at, and the status filter accepts cancelled. A cancelled invoice returns is_paid: false.
• New — The webhook event invoice/cancelled is sent when an invoice becomes fully cancelled. Cancelling the remainder of a partly paid invoice sends invoice/paid.
• New — The Banana and Sage 50 invoice exports include reversal bookings on the cancellation date for cancelled invoices.
• Changed — Deleting a locked invoice returns 422; only drafts can be deleted. Cancel sent invoices instead.
• Changed — Deleting many invoices returns 422 and deletes nothing when one of them is locked.
• Fixed — The Banana invoice export writes each value under its own column heading.
• Changed — Offers return a shorter share_url (https://app.blond.swiss/q/…) and companies a shorter customer_portal_url (https://app.blond.swiss/p/…). Links in the previous format keep working.
• Changed — An offer's approve_url and reject_url return 403 once the offer has expired or is a draft.
• Docs — Webhook event names are written with a slash, such as invoice/paid.

2026-10-19

• New — Organization settings accept documentFooterTextAlignment (left, center, right) to align the footer text on sales document PDFs.
• New — A statement review returns mismatching_iban when the statement names another IBAN than the bank account's. A PDF statement whose transactions also mention that IBAN is staged for review instead of failing.
• Changed — Expense payments return execute_at as a date (2026-10-20) instead of a date-time. A date-time sent as execute_at is stored as its day in Swiss local time.
• Changed — A PDF statement without opening balance is checked against its printed total debits and credits and imported right away when it balances.

2026-10-13

• New — Importing bank transactions accepts PDF bank and card statements with file_type=pdf; each file uses one unit of the expense parser quota. Statements that don't balance are staged as statement reviews, and files that can't be imported are listed when retrieving the import.

2026-10-12

• New — The balance sheet and the income statement can be downloaded as Excel files.
• Changed — Invoices and offers always belong to a top-level project: creating or updating one with the project_id of a sub-project assigns its parent. Sub-projects only hold time entries and expenses.
• Changed — A project with invoices or offers, including deleted ones, cannot become a sub-project: setting its parent_id returns 422.
• Changed — A sub-project of a flat-rate project returns billable_total 0: its parent's offers cover its work. The project filter with_billable_costs also finds projects whose sub-projects have work left to invoice.
• Fixed — The search filter works when listing tags.
• Changed — Listing VAT periods accepts no filters, sorts or includes; filter[search] returns 400. Results are sorted by start_date, newest first.

2026-10-10

• Changed — Creating or updating a project with parent_id validates the parent: it must be a top-level project of the same company, the project must not have sub-projects, be billed hourly and match the parent's is_internal, and costs_limit is required. Otherwise the request returns 422. See Sub-projects.
• Changed — A sub-project cannot switch to flat billing or change is_internal while it keeps its parent (422).
• Fixed — Date-time values with a UTC offset, such as the paid_at of a retrieved invoice (2026-05-11T22:00:00.000000Z), are stored as that moment in Swiss local time. Sending a retrieved object back unchanged keeps its dates.
• Changed — Creating or updating an invoice accepts a paid_at on the issued_at day.
• Changed — Deleting a draft invoice, or permanently deleting any invoice, releases the time entries and expenses it billed.

2026-10-09

• New — The billing of a flat-rate project can be completed and reopened. Projects return is_billing_completed, billing_completed_at, billing_completed_reason and billing_waived_total; with completed billing, billable_total is 0.
• Fixed — Currency differences book gains to the account in accountingFinancialIncomeAccount and losses to the one in accountingFinancialExpensesAccount (organization settings); the defaults are now 6950 and 6900.
• Changed — Deleting a locked account returns 422.
• Fixed — Creating a bank account keeps the given account_id. With accounting enabled, only a bank account created without one gets a new ledger account.
• Changed — With accounting enabled, creating a bank account of a type other than bank requires account_id (422).
• Fixed — Deleting a bank account keeps a linked account outside the 1020–1059 range.
• New — Account sheets of a fiscal year can be generated and retrieved as Excel files with format=xlsx.
• New — Projects return sent_invoices_total, expected_revenue_total and expected_profit_total, also as part of the billing append.
• Fixed — Project financial figures are rounded to cents, so a fully invoiced flat-rate project has a billable_total of 0.
• Fixed — Projects return billed_total and turnover_total as numbers.
• Docs — Project financial figures state that internal costs count expenses gross and that sub-project invoices are not included.
• New — Projects return draft_invoices_total, billable_costs_breakdown and internal_costs_breakdown.
• Changed — A project's profit_total and return_on_investment_total no longer count draft invoices.
• Docs — Project appends and financial figures are documented.
• Fixed — For hourly projects, billable_total equals billable_costs and no longer subtracts earlier invoices.
• Fixed — Lists order objects with the same sort value by ID, so paging through an unchanged list returns each object once. See Sorting.
• Docs — Pagination documents the page and per_page parameters.

2026-10-08

• Changed — Line items of locked offers and invoices can no longer be changed (422). See Locked documents.
• Changed — document_type and document_id are ignored when updating or cloning a document element.
• Changed — Offers the customer approves or rejects stay locked (is_locked: true, locked_at kept).
• Changed — Signed upload URLs no longer accept bucket, expires and visibility.
• Changed — Registering an upload requires the unchanged uuid and key from the signed URL response. Each upload can be registered once.
• New — Organizations return agent_provider_profile, agent_provider_profile_inherited and agent_provider_profile_inherits.
• New — PUT /organizations/{organizationId}/agent-provider-profile switches the AI provider.
• Changed — Without a paid plan, inviting users is limited to 2 employee users (402).
• Fixed — Attachment download_urls keep the file's original name and content type.

2026-10-05

• Fixed — filter[search] finds names and numbers that contain punctuation, e.g. 2311 finds 2311/HR01.

2026-10-02

• Changed — Webhook endpoints require the edit organization permission.
• Changed — Manual bookings require the manage accounting and create journal_transaction permissions.

2026-09-28

• Changed — Project offers (offers, approvedOffers, offers_count) require the show offer permission.

2026-09-24

• Changed — A project's company_id must be an existing company.

2026-09-23

• Changed — Invoice payments validate their input and accept currency and conversion_rate.
• Fixed — Invoice payments without executed_at default to today.
• Fixed — Changing the email via PATCH /user requires verifying it again.

2026-09-21

• New — Invoices have is_dunning_paused, dunning_paused_at and ?append=auto_dunning_active.
• Changed — Sending an invoice or offer fails with 422 when there's no recipient email address.

2026-09-17

• Changed — Invoice recipients and offer email accept an array of addresses.
• Fixed — beforeOrder on the add products endpoints inserts at the given position.

2026-09-15

• New — Expenses have the transmitted status and is_transmitted field.
• New — GET /fiscal_year/{id}/account-sheets returns the latest account sheets download URL.
• Docs — The docs moved to developer.blond.swiss.

2026-09-14

• Changed — The organization's vat_idn accepts Liechtenstein UIDs.