> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcuserp.com/llms.txt > Use this file to discover all available pages before exploring further. # Match a deposit to a payment > Links an inbound bank transaction to a customer payment receipt as reconciled, posting no new GL entry since the receipt's cash entry was already booked when it was recorded. Requires `accounting:write` scope; a receipt deposited to a different bank account is refused with 422 `customer_payment_on_another_bank` unless `move_payment_bank: true` is sent to reclassify it first, and a receipt already matched elsewhere is refused with 409 `customer_payment_already_matched`. ## OpenAPI ````yaml /openapi.yaml post /accounting/bank-transactions/{bank_transaction_id}/match-customer-payment openapi: 3.1.0 info: title: Arcus ERP Public API version: 1.0.0 description: > Arcus ERP public REST API. Designed for external integrations and data migration. **Authentication.** Bearer token (API key) via the `Authorization` header. Format: `Authorization: Bearer ark_live_ent__` (or `ark_test_*` for sandbox). API keys are issued per-entity in **Settings > Developers > API Keys**. **Entity scoping.** The entity is encoded in the API key prefix; routes are flat (e.g. `/v1/accounts`, `/v1/orders`, `/v1/products`). A small set of platform endpoints (migration, reconciliation, events, webhook endpoints, API keys) use the `/v1/entities/{entity_id}/...` form -- those are noted in their tags. **Key capabilities.** - Related-resource hydration via `?expand[]=` (see `x-arcus-expand` on each resource). - Cursor-based pagination (`starting_after` / `ending_before` / `limit`). - Idempotency via the `Idempotency-Key` header. - Webhook events for asynchronous notification. - Conditional requests / ETag for cache validation. **Changelog.** Entries are dated and name every published contract whose MEANING moved, not only the ones whose field names changed. The narrative version of the same entries, written for integrators, is published at https://arcuserp.mintlify.app/changelog. **2026-09-22 (planned 2026-09-21), REORDER-BUYER-TRUTH: demand changed what it MEANS on three published contracts, with no field renamed.** An integrator that pins field names sees no breakage and different numbers, which is why this entry exists. - **Demand now counts build consumption.** `demand_avg_per_day` on the public product, kit and inventory-balance objects, and `daily_demand` / `demand_basis` / `net_suggested_qty` on `GET /v1/purchasing/reorder-report`, are composed from fulfilled sales lines PLUS posted `build_consume` inventory draws: each physical decrement of a product counts exactly once. The previous rule adopted an internal-consumption basis only when the sales blend was exactly zero, so a product both sold AND consumed into work orders planned as if the build draws did not exist. Products drawn into work orders move; on one production-shaped dataset five did, the largest from 0.05/day to 14.95/day. - **`demand_basis` now carries four values, not two:** `sales`, `sales_and_builds`, `builds` and `consumption`. A consumer with a two-branch reader (anything that is not `consumption` is `sales`) silently hides the two new ones. - **`current_demand_units` on `GET /v1/inventory/balances/:id` moved, by a second rule.** It counts committed-but-unshipped CUSTOMER demand, and it now counts a kit component's own line rather than its parent kit line, and excludes non-sales documents. On one production dataset 269 of 1,043 balance rows changed, 227 of them downward; the largest single move was 1,941 to 25, on a product whose open PURCHASE order line had been reported as customer demand. Re-baseline anything that alerts or reorders off this field. - `run_rate_30/90/180/365` and `blended_daily` on the same balance object move for the first reason above. - **Added, not changed:** `GET /v1/purchasing/reorder-report` accepts `demand_window` and returns the unit, cover-through and reorder-point-provenance fields documented on that operation; `order_multiple` is accepted and returned on the product-vendor doors. - **Volume note.** The `inventory.low_stock`, `inventory.out_of_stock` and `inventory.back_in_stock` webhook events are population-gated on `on_hand <= reorder_point`, and reorder points move with the demand above, so subscribers should expect a one-time step change in event volume around the release. servers: - url: https://api.arcuserp.com/v1 description: Arcus ERP API (accepts both live `ark_live_*` and test `ark_test_*` keys) - url: https://dev-api.arcuserp.com/v1 description: >- Dev sandbox API (test-only data, accepts `ark_test_*` keys against dev RDS) security: [] paths: /accounting/bank-transactions/{bank_transaction_id}/match-customer-payment: post: tags: - Accounting summary: Match a deposit to a payment description: >- Links an inbound bank transaction to a customer payment receipt as reconciled, posting no new GL entry since the receipt's cash entry was already booked when it was recorded. Requires `accounting:write` scope; a receipt deposited to a different bank account is refused with 422 `customer_payment_on_another_bank` unless `move_payment_bank: true` is sent to reclassify it first, and a receipt already matched elsewhere is refused with 409 `customer_payment_already_matched`. operationId: matchBankToCustomerPaymentV1 parameters: - name: bank_transaction_id in: path required: true schema: type: string format: uuid requestBody: required: true content: application/json: schema: type: object required: - order_payment_id properties: order_payment_id: type: string format: uuid description: UUID of the order_payment to match to this bank transaction reconciliation_id: type: string format: uuid nullable: true description: Optional active reconciliation session this match belongs to move_payment_bank: type: boolean default: false description: > Required, and only honoured, when the receipt was deposited directly to ANOTHER bank account (candidate `requires_bank_move: true`). Moves the receipt to this transaction's bank account and posts one dated reclassification per cash entry of the receipt before matching. Must be the boolean `true`. responses: '200': description: Matched successfully content: application/json: schema: type: object properties: data: type: object properties: bank_transaction_id: type: string format: uuid order_payment_id: type: string format: uuid order_id: type: string format: uuid nullable: true matched: type: boolean amount_warning: type: string nullable: true book_side: $ref: '#/components/schemas/BookSideStamp' bank_account_scope: type: string nullable: true enum: - same_bank_account - different_bank_account - unknown_bank_account - null description: >- Which bank the receipt was deposited to when it was matched, compared with this transaction's bank account. bank_move: type: object nullable: true description: >- Present when the receipt was moved to this bank account first (`move_payment_bank`). Null otherwise. properties: moved: type: boolean from_bank_account_id: type: string format: uuid from_bank_name: type: string nullable: true to_bank_account_id: type: string format: uuid to_bank_name: type: string nullable: true amount: type: number correction_status: type: string correction_shape: type: string correction_entries: type: array items: type: string description: >- The journal entry numbers of the reclassification posted. '400': $ref: '#/components/responses/Error' '401': $ref: '#/components/responses/Error' '403': $ref: '#/components/responses/Error' '409': description: >- Transaction already matched (`already_matched`), the receipt is already matched to another bank transaction whichever bank it names (`customer_payment_already_matched`, with `claimed_by_bank_transaction_id`; nothing is written or moved), or the receipt's bank changed during the move (`customer_payment_bank_move_race`) content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: > `customer_payment_on_another_bank` (the receipt was deposited to another bank account; the body names both banks, `requires_bank_move` says whether `move_payment_bank` can resolve it, and `deposit_ticket` names the ticket when it was deposited on one), `customer_payment_bank_move_not_posted` (the reclassification could not post; `correction_status` says why and nothing was changed), `customer_payment_bank_move_has_refunds`, `bank_move_target_has_no_gl`, or `unmatchable_payment_status`. content: application/json: schema: $ref: '#/components/schemas/Error' security: - ApiKeyAuth: [] components: schemas: BookSideStamp: type: object nullable: true description: | What the GENERAL LEDGER now says about the money this bank line explains. Added 2026-09-19 by BANKFEED wave 4 lane W4-G, and it is purely additive: no request field changed and no existing response field changed meaning. A bank reconciliation has two sides. The bank side is `reconciliation_status` on the bank transaction. The BOOK side is `reconciled_at` on the journal entry's line on that bank account's GL account, and until this lane no verb outside a statement session ever wrote it, so matched money could read UNCLEARED in the ledger forever. STILL NO GL IS POSTED. The stamp writes no debit and no credit; the trial balance is identical before and after, and a closed period cannot be moved by it. What it changes is which lines the reconciliation workbench and the bank register's open-items tile still treat as outstanding. `stamped: 0` with a `reason` is an honest answer, not an error: `no_leg_on_bank_gl` means the entry carries no line on THIS account's GL (a payout settled to a different account, for example); `already_reconciled` means a session or a baseline had already cleared it; `missing_argument` means the record carries no journal entry to stamp. properties: stamped: type: integer description: How many journal-entry lines were stamped. Normally 0 or 1. line_ids: type: array items: type: string format: uuid description: The journal_entry_lines rows that were stamped. reason: type: string nullable: true enum: - no_leg_on_bank_gl - already_reconciled - entry_not_live - missing_argument - stamp_failed description: Null when a line was stamped; otherwise why none was. historical_import: type: boolean description: | True when the stamped entry came from a data migration. Recorded so the class is countable; a migrated document whose cash really did clear the bank is cleared, and saying otherwise would leave it outstanding forever. correction_legs: type: array description: > WHICH ENTRIES ANSWERED, when the book side was not on the entry you matched. Added 2026-09-23 by BANKFEED wave 4 lane R6-AN. A settlement correction repairs by POSTING and never by mutating, so after one the ORIGINAL entry keeps only its line on the bank the money was never in, and the line this bank account actually clears belongs to the CORRECTION. Before this, a match on such a payout reported `no_leg_on_bank_gl` (a true sentence about the wrong entry), left the real book side uncleared, and the same cash went on being offered as an unlinked-cash candidate for a second bank line. Empty on every ordinary match, including one whose own correction this same request posted. Non-empty only when a live PRE-EXISTING correction held the book side; `stamped` is then the count from those entries and `reason` is null, exactly as if the line had been found on the entry itself. items: type: object properties: journal_entry_id: type: string format: uuid entry_number: type: string entry_date: type: string format: date stamped: type: integer description: Lines stamped on this correction entry. Normally 0 or 1. Error: description: | Alias for ErrorEnvelope. Canonical error response shape used by all API endpoints. Refer to ErrorEnvelope for the full field definition. allOf: - $ref: '#/components/schemas/ErrorEnvelope' ErrorEnvelope: type: object description: | Canonical error response envelope. All API errors use this shape. required: - error - code properties: error: type: string description: Machine-readable error key example: not_found code: type: string description: Machine-readable error code (often same as error) example: not_found type: type: string enum: - validation_error - permission_error - not_found - conflict - rate_limit - internal - expand_error - not_implemented example: not_found hint: type: string description: Human-readable one-sentence explanation (English) example: >- The requested order does not exist or does not belong to this entity. param: type: string description: The parameter that caused the error, if applicable example: expand[0] required: type: string description: The scope required (only on insufficient_scope errors) example: accounts:read request_id: type: string description: >- Unique request ID for support tracing (maps to CloudWatch log stream) example: req_abc123 responses: Error: description: Error response (400/401/403/404/409/422/429/500) content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' securitySchemes: ApiKeyAuth: type: http scheme: bearer description: | API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent__ Test keys use ark_test_ent__. Both are issued per entity via Settings > Developers > API Keys. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.