Canpays are used to facilitate the exchange of invoices, payments, files, messages and pretty much anything between companies. Canpays are jointly controlled between companies, and anything put in them, creates a permanent immutable record for that business engagement.
Create a new Canpay from the plus on the top left and engage a business partner.
Then you can add any media or payments into the chat. All invoices and payments and any editing along the way are a permanent record of this transaction.