The acceptance by a creditor of anything in partial satisfaction of an obligation reduces the obligation of a guarantor thereof in the same measure as that of the principal but does not otherwise affect it.
Mont. Code Ann. § 28-11-216
Effect of part performance on guarantor's liability
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.