An ability to expose and display a current billing amount associated with a billing account in a billing system to one or more third parties, and to link one or more payments from the one or more third parties to the billing account in an account receivable system is provided. A user may create, publish, and share a fundraising webpage, which when accessed by a third party, allows the third party to send a payment in the form of a contribution or donation. An intermediary system allows for secure communication of billing account data from the accounts receivable system to the third party, allowing the third party to interact with the accounts receivable system as if the third party is in direct communication with the accounts receivable system.