The vouchers are redeemed towards United for both the pre-arranged service or the utmost indicated worth.
Usually lodge vouchers do not have a set value or worth on them because the provider would have already organized or pre-arranged with that particular lodge and what the agree upon price might be for any/all certificates introduced… So when introduced and accepted, the voucher might be redeemed by the provider for that quantity that was agreed.
For meals, since they’re or in lots of circumstances may be accepted by a number of distributors (at their discretion until a earlier settlement was reached between the provider and the particular service provider) they often record a most redemption worth and in some circumstances exclusions like no liquor and many others.
The “bank card” numbers you noticed are simply the carriers approach of validating the certificates and insuring its real when its acquired by their acccounts payable division.
Bigger retailers who settle for these certificates on bulk (like airport distributors and airport space motels) “redeem” then towards the airline through digital method- utilizing these numbers primarily because the authentication code for every one redeemed.
For companies who do not settle for loads or do not use an e-system for vendor patents often bodily mail them into the provider to obtain fee.