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Tout indique qu’il s’agit bien de garanties hypothécaires :
"A company charge is something a company uses to secure a loan. When creating the charge, a company or its representative must give a statement of the organisation’s particulars. This statement will include any relevant certified copies of the charge instrument and a relevant fee, which they send to the Registrar of Companies (Companies House).... When filing a charge, it’s necessary to use certain forms. These forms can be tracked by the company filings released by Companies House. They include:... MR04 – Statement of satisfaction in full or part of a charge" (source : https://www.doorda.com/glossary/company-charges-and-mortgage...

"Charge is created as security for loan or debentures or as security for some other purpose. If the amount of loan is repaid or debentures are fully paid or other purpose is fulfilled, there remains no necessity of the charge. This is called satisfaction of charge. (source : https://www.caclubindia.com/forum/what-is-satisfaction-of-ch...