From Black\'s Law Dictionary: \"as regards sale of real estate, refers to the final steps of the transaction whereat the consideration is paid, mortgage is secured, title is transferred, deed is delivered or placed in escrow, etc....\". In this sense, \"perfeccionamiento del préstamo\" can be used for \"loan closing\". The \"fees\" related to a loan are often referred to as \"gastos\" or \"costos del préstamo\"
So, an option could be: \"Gastos normales de perfeccionamiento del préstamo y honorarios legales adecuados\". \"Appropriate\" can also be \"correspondientes\" or \"pertinentes\".
Best regards,

Patricia