Currently, there are no currency control restrictions in the EU countries regarding operations on foreign accounts of citizens.
As a general rule, member countries of the International Monetary Fund (IMF) cannot independently impose restrictions on foreign exchange transactions, but only with the consent of the IMF. An exception is provided for developing countries. Thus, currency control operates in such countries as Argentina, Armenia, Belarus, India, Russia, Uzbekistan, and Ukraine. At the same time, the number of restrictions and requirements for foreign accounts in different countries is different.
There are restrictions on the movement of cash in the European Union. When entering or leaving the EU countries, there is an obligation to fill out a declaration in case of moving cash in the amount of more than 10,000 euros (or the equivalent in other currencies, bonds, shares or traveller's checks). Customs authorities are authorized to check persons, their luggage and vehicles, and are also authorized to detain undeclared funds.
In addition, if there are signs that cash is associated with criminal activity, then the specified powers of the customs authorities may operate with a smaller amount of valuables.
If the declaration is not filed, the cash may be withheld and a fine may also be imposed. Each state is free to impose sanctions that are "effective, proportionate and dissuasive".
The countries also exchange information about the declaration / non-declaration of the transferred currency.
Declaration forms can be found here. Declarations are available not only in the languages of the EU countries but also in the languages of a number of other countries, including Ukrainian, Turkish, Russian.