The phrase "an additional guarantee" is correct and usable in written English.
You can use it when referring to an extra assurance or promise that adds to an existing guarantee.
Example: "The company offers an additional guarantee on all its products to ensure customer satisfaction."
Alternatives: "an extra assurance" or "a supplementary guarantee."
"This is not going to be a substitute for any legal or criminal penalties but will be an additional guarantee, an acknowledgment of the seriousness of the problem".
If the student applies for and is assigned housing later in the same academic year, we will not take an additional guarantee year.
Under the scheme, housing developers pay the lender 3.5% of the purchase price of a new-build property while the government provides an additional guarantee of 5.5%, to be called upon only if there is a crash in house prices.
Messene lost its independence to neighbouring Sparta during the course of the 8th century, and this fact is an additional guarantee of the reliability of the early Olympic victor list: Messenian victors would hardly have been invented at a time when Messene as a political entity had ceased to exist.
In them, for the first time, states and international communities recognized that there are people living outside normal legal protection and who required an additional guarantee of their elementary rights from an external body, as protection within individual states itself may not be sufficient.
By belonging to this group, the Centre Oscar Lambret provides an additional guarantee of quality and effectiveness to its cancer treatment, teaching and research actions at the service of the patient.
Always put on the warranty and pay for any additional guarantees.
But whoever espouses these ideas also tends to see the barrier as an effective, additional guarantee of some semblance of normal life in Israel.
It will function as a "one-stop-shop", offering access to existing EU facilities (when EU grants are combined with loans or equity from public and private financiers), coupled with a new, additional guarantee for public and private investors.
To prevent its possible closure, Valls pledged a €200 million loan and an additional financial guarantee for €220 million (Delamarche 2016b).
Guarantees were crucial to making the loan work: Fair Food requested support from community members and raised $50,000 in RSF Social Investment Fund accounts to back the loan, and RSF provided an additional $20,000 guarantee from the Local Initiatives Fund.
