Electronic Invoice
By Mario Perez Villeda Monday, June 29, 2009
Business For 10,000 Pesos
e-mail:
mperez@facturasat.com
Mobile: 55-3306-5264
At present there are some sectors in Mexico that have integrated their suppliers to the issuance of digital invoices defined by the SAT. Covering the use of invoices, credit notes and office.
From the beginning many of these companies began to require essential business information on the label ADDENDA defined what is beginning to CFD issuers have to resort to technology companies that can make a ADDENDA This has impacted the major recipients of electronic invoices as some companies of this type must have a solution that allows them to receive validate following previously before accepting a bill from their suppliers: Uses a digital seal certificate
current request is granted with tax requirements defined in Annex 20
complement already published the SAT as it is the bank statement, retail sector;
There is also now being Figure of PACFD (Authorized Provider for the generation of digital invoices), a company that is required to be certified by SAT as long as do some of the following "off-site of its contractors"
Generation of XML. Ward 
the CFD. Generation monthly report.
Administration pages. Administration digital seal certificate.
In this case the issuance of the invoice must also comply with the Add-use Digital tax receipts issued by an Authorized Provider of digital invoices (PACFD) where you use the digital seal certificate service provider and the issuer.
As CFD receiving companies must have an application that can receive information on bills with the following characteristics:
- Commercial Addenda. Add
- Concept (the choice of the issuer)
- used only when an authorized third party. The concept complement. If you require more information
- contact
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NOM 151, What is it and how it works
NOM 151 Trade Practices
conservation message (contracts, agreements or commitments)
According to Articles 34, 39, 47 and 23 published on September 28, 2001 defined the guidelines whose content should be kept full and unchanged from the generation that should be accessible.
information is to be preserved in 1 or more different files and / or other computers. Well as be able to migrate to a digital form.
NOM 151 Trade Practices
conservation message (contracts, agreements or commitments)
- By Mario Pérez Villeda
- www.facturasat.com Mobile Phone: 55-3306-5264 E-mail
- : mperez@facturasat.com
- According to the NOM 151 SCFI 2002 sets out the considerations that should be used to protect consumer interests and should observed for the conservation of data messages such as agreements, contracts or commitments.
According to Articles 34, 39, 47 and 23 published on September 28, 2001 defined the guidelines whose content should be kept full and unchanged from the generation that should be accessible.
- Same security used to ensure the integrity and authentication using:
which is used in the partial file AS1 (Abstracts Sintax Notation) Abstract Syntax Notation. 
digital seal certificate.
Traders
Who will messages.
Where should generate partial files to post ASN1 and contain:
A. - filename.
B. - File type
C. - Content therein.
This in turn will carry a digital short.
Same is calculated according to the partial file or partial file using MD5 digest method (Cryptography).
Electronic File
ASN1 It creates a message containing the following information:
A. - Name the file (which is equal to the name that identifies initially).
B. - An index that contains the name and summary of each partial file is part of the record.
C. - Identification of the PSC (Lender of NOM 151).
D. - Your digital signature.
This in turn will generate the record of the document and / or electronic documents, images, etc,.
Obtaining
constancy
record is received by the service provider 151 NOM who is responsible for issuing the record in ASN1 format.
The resulting file can be sent as an attachment by email and / or published on the Web.
"How is a record?.
The lender will form a record ASN1 format containing:
a. - name of the file where it will
stored records. b. - The record sent by the system.
c. - Date and time of creation of the record.
d. - The identification of the provider of the NOM.
e. - Your digital signature.
As you can verify authenticity.
To validate a record is made as follows:
1 .- verify the digital signature of the provider.
2 .- Check the operator's digital signature on the record contained in the record.
3 .- Recalculate included partial file.
ASN1 definition
It identifies the different file types
is
digital signature applied
He integrates the timestamp in the date format and time in GMT format or IMT
folio is applied user
And it generates the name of the record.
you require further information contact:
- Mario Pérez Villeda Rights Reserved e-mail: mperez@facturasat.com
-
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