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# Invoice payments

Invoice payments are derived from payment receipt CFDIs, also known as type `P` invoices. A payment receipt records payment activity for a previously issued deferred invoice.

Each payment belongs to a [batch payment](https://docs.syntage.com/api-reference/ds-mx-sat-invoice-batch-payments) and the invoice it was applied to. Syntage updates the related invoice's `paidAmount`, `dueAmount`, and `fullyPaidAt` fields based on the received payments.

Invoice payments are extracted from invoice data. To retrieve them, run an [`invoice` extraction](https://docs.syntage.com/resources/datasources/sat/invoices#extracting-invoice-data) for the entity and include payment receipt CFDIs by keeping type `P` invoices in the extraction options.


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