The money is leaving with her anyway, so it doesn't matter to me if I give it to her before, after, during, or whatever. To me, if she is going to give a good performance then she will do so no matter when she gets the money...so long as she gets it. I just have it in an envelope and drop it on a counter or table before things start. Some ladies don't look at it or touch it until they are leaving. Some grab it first. Sometimes I don't even know they took it. Doesn't really matter. Tips should always come afterwards if you are going to give them.

I'm not sure how you're "wrapping" your donation but it's all very simple. Put it in an envelope and place it somewhere obvious for her to see upon arrival. At that time you havent done anything illegal so no worries. LE check is always done right up front in various ways so when all is comfy you can proceed with the real fun! A true lady will not open and count it in front of you but some will discreetly pick it up and maybe count it in the bathroom or some will not.
And if your "waitress" serves you a fine meal, there's nothing wrong with throwing a nice tip down on the table before you leave. That always puts a smile on their face.
Remember that this is a business and it's all about the infamous "envelope"

Once a lady gets cheated out of her pay, she's going to take the precaution to be sure she gets paid up front.  I almost never pay first, but the ladies know me.  If she requests, I gladly oblige.

And sadly, there are enough dirt bags out there for the ladies to worry about it.

For me, it's whatever you're comfortable with. I prefer not to have the donation discussed at all. BUT if I'm unsure about someone, after a few min of conversation I'll sweetly ask if they'd like to get the necessity's out of the way.
I have saved myself some grief by doing this. If someone is going to try to 'pull a fast one' they usually start stammering something like "I only brought x-dollars, is that ok?" I then kindly tell them "No" and thanks for stopping by but it's time for them to go.

Most gentlemen just take an envelope out of their pocket and place it somewhere I can see it.

and whatever happens, happens... some win, some lose, some don't come...

Some ladies will ask for the donation, most won't. Either way you better believe they are thinking about it. I always place it in plain view when I arrive for an in call or have it already in plain site when it's an out call. In or out of an envelope would depend on the gal's specified preference on her or her agency's web site.
The reason for the envelope is quite simply so that the provider can play dumb if you turn out to be LE and claim that she did not know what was in the envelope.

My feeling about the donation is quite simply that I know I am going to have a better time if the lady is not worrying about it.  She may not ever mention it but only a fool would assume that she isn't worried about it from the moment she walks in.  Unless of course you are a regular.

I have my donation ready in a plain white unsealed envelope and I put it up before. One time with one of my regulars I forgot and it was in my back pocket and I have a habit of patting my pockets before I leave checking for wallet and keys and etc. and I felt something in my back pocket and my lovely Provider never did ask I put it on the tv on my way out. I called her when I was in my car and mentioned this to her and she said everything was cool.

the rate is negotiable as far as some men are concerned if they

don't pay up front.

ive had guys try to underpay, saying they didn't know my rates.

guys take back some money while i went to the bathroom. well dressed, well off professionals.  

guys who try to leverage extras mid session because they didn't pay front. oh i assumed greek, oral, whatever  was included and if not i'm not paying you.

guy deciding 40 minutes into the session, i'm not the girl in the pics (whaat?) and they don't have to pay.  

a regular guy who stayed for an extra hour  and didn't think he was expected to pay, though i was clear the hour was up unless he was extending. when i saw the donation, i told him he better hit up an atm and come back or never call me again.

finally, this last one hasn't happened to me. everything else above has. but money can also be counterfeit.  

just ridiculous stuff. i get paid up front. i count it and hide it for real.  

Whether you touch the money or not , LE will haul your ass off just for showing up. So the second you walk through that door they're going to try and haul you away. In some cases, women don't even see money presented and they're soon led away in cuffs.

It's customary to pay upfront and put the money in an unsealed envelope either in a place of her choosing (if she's got it spelled out on her site) or on the table without any fanfair.

The reason ladies ask for it upfront is unfortunately, many of your bretheren decide to short a lady, put fake bills in the envelope, literally RUN out of sessions, put singles and coupons or something in there, all sorts of shenanigans.

I would follow the directions on her site. Personally, I like my envelope unsealed and up front either in the bathroom or out in the open where I can discreetly check it or palm it so we don't skip a beat.

Katie

I've always put it inside of a card and leave it on a counter / table when I come in, or if she visits me have have the envelope on a table when she comes in.

I put the envelope on the dresser, or something. I then excuse myself to brush my teeth. That gives her a few minutes to check the envelope without the awkwardness. Oddly enough, I think 90% of the time, the lady doesn't touch the envelope until after I leave.