Change of numerical series for Invoicing

Typically, you would need to change a numerical series for Invoicing on New Year´s day, or the subsequent day. We will show you an example of changing the series from 2017 to 2018.

icon info2 How to set invoice numbering

Generation of Invoices

You have to set up a new numerical series for new invoicing in 2018. Enter a new number into Opening invoice number in Invoicing Invoices Invoices, e.g. 2018000001,  thus creating automatically the new numerical series for 2018.

alert icon  A new numerical series for a selected invoice group must be greater than the highest used invoice number for the invoice group. If the new numerical series were smaller, the system would then use the highest used invoice number and increase it by 1.

Change just the year number in most of the cases. E.g. from series 2017XXXXXX to 2018XXXXXX.
If old numerical series had e.g. 7 digits, the new one must be greater.
Either 218XXXX, or 8 digits.


Creating Standalone Invoice

A new numerical series may also be created by creating a standalone invoice for a client. So if you are creating a standalone invoice, change Invoice number in Client card, Invoicing - icon create invoice Create standalone invoice in the same way.

The following topics may relate to the above-mentioned change of numerical series for Invoicing.


If you continue to include overpayments into VAT (Invoicing Settings Invoice group), you have to change Initial value of number line of included overpayments to VAT (VAT documents), in Overpayments section following the same logic.

Client´s Cash Payment

If you continue to use numbering of cash receipts for clients´ payments base on invoice groups (settings: Invoicing Settings General, ID hotovostni_doklad_rozdeleni = 1), you have to change Cash Receipt Number in Client card, Invoicing - icon money acceptReceive payment in cash.

Tips on how to use this documentation



Searching required information is possible either via structured menu which is divided into sections, or via full-text search of the entire contents of this on-line documentation.

This aid will make it possible for you to find out where exactly you are at the moment.

If, for example, the following appears beneath the main menu - ISPadmin Wiki / ENG / Client management / Menu - CLIENTS / Clients / Message Board / Groups - it means that you are:


  • in the Wiki documentation of the ISPadmin system
  • in its English localization
  • in the Client management section
  • in the Clients tab
  • in the Message board subtab
  • in the Groups sub-subtab


It contains newly added functionalities and modifications of the system which are displayed by versions and issue date. Changelog articles are also displayed in individual sections / pages of the documentation which relate to new functionality or modification. 

Basic orientation

You will find a welcoming menu with basic instruction on trying / implementing / using below. 


Frequently asked questions along with most important procedures and settings are listed in FAQ section. 


Items which refer to real system menu are highlighted in corresponding colour, including their graphical background. Eg. Invoicing Settings Templates Reminders. This is also a working reference to an article. 


NET service solution, s.r.o.
Žerotínova 3056/81a
787 01 Šumperk
Czech Republic