A more thorough explanation:

De plegiis acquietandis is a Latin term used in law that means "for acquitting or releasing pledges." It refers to a writ that orders repayment to a surety by a principal who had failed to make a required payment that the surety then had to cover.

For example, let's say John borrowed $10,000 from a bank and his friend Tom acted as a surety for the loan. John failed to make the required payments, and the bank demanded payment from Tom. Tom paid the bank, but he can use the writ of de plegiis acquietandis to order John to repay him the $10,000 he had to cover.

Another example could be a contractor who hires a subcontractor to complete a project. The subcontractor fails to complete the work, and the contractor has to pay another company to finish it. The contractor can use the writ of de plegiis acquietandis to order the subcontractor to repay them for the additional costs incurred.

These examples illustrate how the writ of de plegiis acquietandis can be used to ensure that a surety is not left with the financial burden of covering a principal's failure to make a required payment.