1 files changed, 11 insertions, 1 deletions

diff --git a/61.md b/61.md
index f219f11..2cf27d5 100644
--- a/61.md
+++ b/61.md
@@ -114,4 +114,14 @@ Events that redeem a nutzap SHOULD be published to the sender's [[NIP-65]] relay
 
 2. Clients SHOULD normalize and deduplicate mint URLs as described in NIP-65.
 
-3. A nut zap MUST be sent to a mint the recipient has listed in their `kind:10019` event or to the NIP-65 relays of the recipient, failure to do so may result in the recipient donating the tokens to the mint since the recipient might never see the event.
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+3. A nut zap MUST be sent to a mint the recipient has listed in their `kind:10019` event or to the NIP-65 relays of the recipient, failure to do so may result in the recipient donating the tokens to the mint since the recipient might never see the event.
+
+## Appendix 1: Alternative P2PK pubkey
+Sometimes clients might not have access to the user's private key (i.e. NIP-07, NIP-46 signing) and, as such, the private key to sign cashu spends might not be available, which would make spending the P2PK incoming nutzaps impossible.
+
+For this scenarios clients can:
+
+* add a `pubkey` tag to the `kind:10019` (indicating which pubkey senders should P2PK to)
+* store the private key in the `kind:37375` event in the nip44-encrypted `content` field.
+
+This is to avoid depending on NIP-07/46 adaptations to sign cashu payloads.
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