My understanding of a charge on a property usually means that if you sold the property, they would be entitled to receiving a certain amount back (e.g. to repay a loan or mortgage). You could clarify the exact amount by applying to Equifax or Experian for a credit report. Alternatively, you could ask the company who put the charge on. Theoretically, if the charge was for a mortgage, then they could sell the property to get their money back but you would know this well before hand. I'm sure you would be able to contact the company before this is necessary.