Magna (Cosma, Formex) addenda for CFDI 4.0
Invoice Magna (Cosma, Formex) with its addenda in CFDI 4.0, from the web portal or through the API.

- Industry
- Automotive
- Price
- $555 MXN per year, VAT included. No Premium needed.
- With Premium
- Included, along with every addenda in the catalog
- Variants and group companies
- Cosma · Formex
What the Magna (Cosma, Formex) addenda is
It is a block of commercial data that Magna (Cosma, Formex) asks for inside your invoice XML to find their order and pay you. It goes after the stamp, so it doesn't change the CFDI's validity with the SAT.
Automakers and their suppliers receive thousands of invoices per plant. The addenda ties each invoice to the purchase order, the part number and the plant that received the material, so it can be paid without manual review.
Data it usually asks for
- Supplier number
- Purchase order and line number
- Part number for each item
- Receiving plant or warehouse
- Delivery note, ship notice or receipt number
Each company defines its own addenda. The exact fields are in the manual your buyer or the Magna (Cosma, Formex) accounts payable team gives you.
How to invoice Magna (Cosma, Formex) with its addenda
- 01
Get a quote
Tell us you invoice Magna (Cosma, Formex). An advisor goes over the manual or XSD schema your buyer gave you.
- 02
We set it up
We get the Magna (Cosma, Formex) addenda ready in your account, for $555 per year or included in Premium.
- 03
Invoice and deliver
When you invoice you fill in the data Magna (Cosma, Formex) asks for and the XML goes out with its addenda, ready for their portal or mailbox.
One addenda or all of them
If you only invoice with the Magna (Cosma, Formex) addenda, you pay $555 per year, VAT included, with no subscription. If you invoice several companies with addendas, Premium includes all of them for $450 per month.
Questions about the Magna (Cosma, Formex) addenda
What people ask us most before invoicing with an addenda.
Ask an advisorHow much does the Magna (Cosma, Formex) addenda cost?
$555 per year, VAT included, and you don't need Premium. If you invoice several companies with addendas, Premium includes all of them for $450 per month or $4,500 per year. Either way, each CFDI uses one stamp from your package.
Does the Magna (Cosma, Formex) addenda affect the stamp?
No. The addenda goes in the cfdi:Addenda node, outside the original string, so the SAT doesn't check it and it doesn't change the seal or the Timbre Fiscal Digital. Magna (Cosma, Formex) checks it.
What data do I need to invoice Magna (Cosma, Formex)?
Whatever its addenda manual asks for. In the automotive industry it is usually: supplier number; purchase order and line number; part number for each item; receiving plant or warehouse; delivery note, ship notice or receipt number.
How do I turn on the Magna (Cosma, Formex) addenda?
Get a quote from an advisor. They go over the Magna (Cosma, Formex) manual or XSD with you, we set it up in your account and let you know when it is ready to invoice.
Can I invoice Magna (Cosma, Formex) from my ERP?
Yes. With API v5, included in the service, your system sends the CFDI data and the addenda data in the same request and gets back the stamped XML with the addenda. You can also invoice from the web portal without integrating anything.
Invoice Magna (Cosma, Formex) with its addenda
Tell us what your customer asks for and we'll get back to you with a proposal.
