Is it possible to number invoices inconsistently?

Question

Law in IT

I work with a European company, can I, for example, after the 20th invoice, submit the next one under number 25?
It seems as I understand that in the Russian Federation there is no strict law on the sequence of numbering invoices for payment, is that so?

Answer 1

of course
you can do without a number at all,
this is a convenience to find it yourself later