Not really, and all the money needs to be declared anyway. I'll give you an excerpt of relevant law text, some stuff removed as there's a lot of fluff:
Election campaign expenses shall comply with the following conditions:
a) come solely from contributions by candidates or political parties;
b) they shall be incurred only with the prior approval of the competent financial trustee;
c) they must fall within the limits provided for by this law;
d) to be made by electoral competitors only for the promotion of their candidates and electoral programs.
(2) The collection of electoral contributions and the payment of electoral expenses may be made only through bank accounts notified in advance to the Permanent Electoral Authority.
[...]
(11) Candidates' contributions for their own election campaign or that of the political party that nominated them may come only from donations received by candidates from individuals, from their own income or from loans taken by them from individuals or credit institutions.
[...]
In the event of the commission of an offense provided for by this Law, in violation of this Article, the sums of money related to the electoral expenses incurred in violation of this Article shall be confiscated and paid into the state budget
The financing of the electoral campaign, directly or indirectly, by natural persons who are not Romanian citizens or by legal entities of a nationality other than Romanian, is prohibited, with the exception of financing by citizens of Member States of the European Union who are domiciled in Romania and are members of the political party to whose electoral campaign they are making a financial contribution.
Thank you for doing the research.
There seems to be an awful lot of people that just can't get the fact that other countries can have different laws.
...and that the EU has many different countries, too.
Election campaign expenses shall comply with the following conditions: a) come solely from contributions by candidates or political parties; b) they shall be incurred only with the prior approval of the competent financial trustee; c) they must fall within the limits provided for by this law; d) to be made by electoral competitors only for the promotion of their candidates and electoral programs. (2) The collection of electoral contributions and the payment of electoral expenses may be made only through bank accounts notified in advance to the Permanent Electoral Authority. [...] (11) Candidates' contributions for their own election campaign or that of the political party that nominated them may come only from donations received by candidates from individuals, from their own income or from loans taken by them from individuals or credit institutions. [...]
In the event of the commission of an offense provided for by this Law, in violation of this Article, the sums of money related to the electoral expenses incurred in violation of this Article shall be confiscated and paid into the state budget
The financing of the electoral campaign, directly or indirectly, by natural persons who are not Romanian citizens or by legal entities of a nationality other than Romanian, is prohibited, with the exception of financing by citizens of Member States of the European Union who are domiciled in Romania and are members of the political party to whose electoral campaign they are making a financial contribution.
Translated with DeepL.com