The creditor shall proceed with the seizure by serving a document containing, under penalty of nullity :
1° The name and domicile of the debtor or, in the case of a legal entity, its name and registered office;
2° An indication of the writ of execution by virtue of which the seizure is carried out;
3° A statement of the sums claimed in principal, costs and accrued interest, together with an indication of the interest rate;
4° An indication that the seizure renders the pecuniary rights attached to all the shares or securities held by the debtor unavailable;
5° A summons to disclose the existence of any pledges or seizures.