I have collected some data to clarify the use of Pro Forma Invoices with repect to their use for payment in advance. Please have a look and comment http://code.google.com/p/tryton/wiki/ProFormaInvoice.
Thanks!
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Mathias Behrle
MBSolutions
Gilgenmatten 10 A
D-79114 Freiburg
Tel: +49(761)471023
Fax: +49(761)4770816
http://mbsolutions.selfip.biz
UStIdNr: DE 142009020
PGP/GnuPG key availabable from any keyserver, ID: 0x89BCA161
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