Peace be upon you. It is disliked to refuse a beggar even if you suspect they are wealthy; rather, you should give them something, even if it is little. According to Grand Ayatollah Sistani, it is better to give to the beggar. Grand Ayatollah Khamenei also advises that it is preferable to give voluntary charity to a poor, dignified, and religious person. May you be successful in all good deeds.