Unknown Token for Liquidity Mining on DEFI Chain and Receipt

Is it possible to add an not listed token. Actually all liquidity tokens are not listed and some tokens which do no longer exist are as well not listed.

Further were can i get my receipts both for paid standard account as well as for pro account?

I believe you should have gotten an email receipt when you paid, or email support@accointing.com

The following links you may find helpful:
Liquidity Pools: below is a link to a blog post about the topic, staking pools would be handled the same way as liquidity pools. Liquidity Pool Transactions - The Hub on ACCOINTING.com
Some Staking Articles in The Hub: You searched for staking - The Hub on ACCOINTING.com
Manual entry of tokens: Manual entry of tokens (those not listed on CoinmarketCap)