payment in advance

a transfer of something of value to compensate for goods or services that is made prior to the receipt of such goods or services (Dic)

In other languages:

• ħlas bil-quddiem [MT] - trasferiment ta' xi ħaġa ta' valur għal oġġetti jew servizzi li jsir qabel ma' tirċievi l-oġġetti jew servizzi
• pagamento in anticipo [IT]