Conservation of electronic invoices is an obligation for companies and professionals. The files arrive signed in .p7m format and must be managed in an orderly manner. In this guide we see how to open, save and store .p7m invoices correctly.
Why invoices are stored in .p7m
The .p7m file contains the XML invoice plus the digital signature: it is precisely the signature that gives legal value to the document. Therefore, for conservation purposes, the signed .p7m file is the original proof of the invoice.
Open to check, keep the original
A good workflow is:
1. Open the .p7m invoice with P7M Viewer to check its contents (vendor, amounts, VAT).
2. If you need a readable copy, save it as PDF with "Print → Save as PDF".
3. Keep the original .p7m file, which maintains the signature and legal value.
Organize invoices in bulk
At the end of the month or quarter it is convenient to open many invoices together. With the multiple opening of P7M Viewer you load all the .p7m at once and get the extracted XML in a single ZIP archive, ready for archiving or for the accountant.
Conservation compliant with regulations
For compliant conservation (replacement) there are dedicated services and the conservation of the Revenue Agency. P7M Viewer helps you in the daily part: open, read and organize invoices quickly, so you arrive at storage with documents in order.
Frequently asked questions
Should I keep the .p7m or the XML? The signed .p7m file is the legal original; the extracted XML is for convenient reading.
Is opening invoices for review free? Yes, opening a single file is free.
Can I do it from my phone? Yes, with the free P7M Viewer app for Android.
In summary
To preserve electronic invoices well: open and check .p7m files with P7M Viewer, save PDF copies when needed and keep signed .p7m originals. Simple, tidy and free to open.
