Check for possible duplicate bills

GET/api/v1/bills/duplicate-check

Advisory, read-only check used during bill entry. Returns existing bills that may duplicate the one being entered (same bill number, or same vendor and amount within ~90 days). Never blocks creation — it is purely a heads-up so the user can confirm before saving.

Operation ID: check_duplicate_bills·View as markdown·OpenAPI slice

Authentication

Bearer token authentication. Pass your DayZero API token in the Authorization header and the target business UUID in x-business-id.

Parameters

Query

bill_numberstring: In-progress bill/invoice number to match (optional).
vendor_idstring: In-progress vendor UUID to match (optional).
amountinteger: In-progress amount in cents to match (optional).
received_onstring · date: Invoice date (YYYY-MM-DD); bounds the vendor+amount lookback window.

Responses

200Successful Response

Schema: SuccessEnvelope_DuplicateBillCheckResponse_

successboolean
messagestring
codestring
dataDuplicateBillCheckResponse

401Unauthorized - Missing/invalid token or no access to this business

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

403Forbidden - Insufficient permissions

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

422Validation Error

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

Code samples

GET/api/v1/bills/duplicate-check

bash

curl -X GET 'https://api.ondayzero.com/api/v1/bills/duplicate-check' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID'