The money is visible to anyone with the viewing key. Who gave it is not. The key cannot spend.
For funders who want to stay anonymous while anyone can still check the money.
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-cli --chain testnet --server https://testnet.zec.rocks:443 --viewkey <viewing key> --birthday 4492700 --waitsync balanceCopy gives the full command with the key in place. It needs a zingo-cli build that supports the latest Zcash testnet upgrade (NU7). Expect a confirmed balance of 12,390,000 zat, which is 0.1239 TAZ.
A wallet made from this key cannot send. Trying returns "No spend capability".
Anyone with the key can read memos. A funder who pays from a transparent address is visible on chain anyway.