External IDs

Every organization and invoice is identified by an externalId, the identifier from your own system. You do not store Lunch identifiers.

Invoice Identifiers

Invoice identifiers are unique per payee, not per account. For this reason:

• The invoice sync body includes both the payee and the payor.
• POST /v1/advances requires payeeExternalId and invoiceExternalId.

Unrecognized Identifiers

Invitations and quotes return 404 business_not_found for an organization that has not been synced. Nothing is created. Syncing an organization, or an invoice that names it, makes the identifier available.

Resending Records

Writes are idempotent, so you do not need to track what you have sent. Resend records when they change or on a schedule.

What's Next

• Idempotent Requests