If a party refuses to admit the genuineness of any document or the truth of any matter as requested under Rule 33, and if the party requesting the admissions thereafter proves the genuineness of the document or the truth of the matter, said party may apply to the court for an order requiring the other party to pay him the reasonable expenses incurred in making that proof, including attorney’s fees. The court shall grant said award unless it finds that:(1) The request was held objectionable pursuant to Rule 33(a); or(2) the admissions sought were of no substantial importance; or(3) the party which refused to admit had reasonable grounds to believe that he might prevail on the matter; or(4) there was other good reason for the refusal.
Puerto Rico Legal Code