The phrase "a written guarantee" is correct and usable in written English.
You can use it when referring to a formal assurance or promise that is documented in writing.
Example: "The company provided a written guarantee for the product, ensuring that it would be repaired or replaced if any defects occurred within the first year."
Alternatives: "a written assurance" or "a documented guarantee".
Conte is believed to want a written guarantee of no jail time before cooperating.
Bill Kristol has a written guarantee of editorial independence, and he is unlikely to go easy on Hillary.
Can you show me a written guarantee from your suppliers stating that your diamonds are conflict-free?
Expect to spend $200 to $1,200; request an estimate and a written guarantee specifying how long you can expect to be bee-free.
So before Howard took his first swing, he had a written guarantee that he would receive scholarship money in his other seasons.
Mr Cameron also wants a written guarantee – making explicit what is already the case – that unanimity should apply to any proposed "user charges" for financial groups, including any variant of the controversial European financial transactions tax.All useful.
Thus, for example, suppose that when the customer purchased a certain item, he received a legally binding written guarantee from the seller.
When contacted for this story, Fragin the Lamm spokesman said of his client's written guarantee about the 2014 mayoral election, "At worst, it was in-artful language".
The vehicles carry written guarantee will depend on the professional buying and selling dealer or the duration thereof.
Benítez insisted on the insertion of a series of written guarantees in his revamped contract and will exercise full autonomy over, critically, recruitment as well as assorted other spheres including the academy and a re-modelling of the training ground.
On Sunday, Mr. Assad added a new condition, demanding written guarantees that rebel forces would lay down their arms before his forces would withdraw.
