# Funding Hints URIs
source: https://developer.mastercard.com/mastercard-send-funding/documentation/field-uris-codes/funding-hints-uris/index.md

The following schemas can be used in `funding_hints` fields.

| Schema |                                                                                                                                                                                                                                               Description                                                                                                                                                                                                                                                |                                                 Example                                                 |
|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
| ucaf   | Universal Cardholder Authentication Field (UCAF) value if collected. UCAF may also be a static Accountholder Authentication Value (AAV) if the merchant acquirer and the cardholder participate in the Mastercard/Maestro Advance Registration Program (MARP). Provide the Identifier assigned to the merchant acquirer in MCAID (Funding Mastercard Assigned ID). Only provide if Channel is Web or Mobile and UCAF is supported. Data format: * ucaf = string, length 1-32 * mcaid = numeric, length 6 | **UCAF only:** ucaf:jJJLtQa+Iws8AREAEbjsA1 **UCAF and MCAID:** ucaf:jJJLtQa+Iws8AREAEbjsA1;mcaid=123344 |
| cavv   | Verified by Visa (CAVV) value if collected. Data format: string, length: 1-40                                                                                                                                                                                                                                                                                                                                                                                                                            | cavv:00000109260000719349                                                                               |