The phrase "an additional form" is correct and usable in written English.
It can be used when referring to an extra type or version of something, often in contexts like forms, documents, or methods.
Example: "Please fill out an additional form if you wish to apply for the scholarship."
Alternatives: "an extra type" or "a supplementary version".
In addition, two recent studies demonstrated an additional form of auto-reactive BCR signaling in CLL termed autonomous BCR signaling (Duhren-von Minden et al. 2012; Iacovelli et al. 2015).
It corresponds to an additional form of angular momentum ascribed to a spinning motion.
He recalls how prisoners were routinely herded into a concrete chamber and required to sleep standing up as an additional form of humiliation.
(REUTERS) A Cancer Drug Is Approved for Broader Treatment The biotechnology companies Genentech and Biogen Idec said yesterday that federal regulators had approved their non-Hodgkin's lymphoma drug, Rituxan, to treat an additional form of the disease.
J. K. Rowling's books were already very special to children, which made the movie's release an additional form of healing for our city's children, who are still coping with the events of Sept. 11.
Tavira today has some tourism, but thankfully the region has managed to hang on to its historic livelihood, and visitors are seen as an additional form of income rather than an alternative.
But an additional form of payment that is absent in property casualty transactions results in higher individual costs for corporate employees who choose to buy life, disability or accident coverage beyond the amount provided by employers.
When banks receive a government backstop because they are too big to fail, this is an additional form of implicit subsidy; you cannot see it in the government's budget but it may be huge).
But to stake their claim, they'll have to fill out an additional form, 4684.
